Are Black Markers Really Black? A Chromatography Lesson.

are black markers really black chromatographyWhat color is black? Is it one color or many colors combined to “look black”?

Black is the absence of all reflective colors, and when the three primary colors (red, yellow, and blue) are combined in just the right way, they give off the appearance of black.

We set off to find out more about the predominant colors in our black Crayola marker, and to do this we had to separate the colors. The chemical technique used to separate dyes, pigments, or colored chemicals is known as chromatography. 

This activity can take anywhere from 5 minutes to 25 minutes, depending on how much experimenting your child wants to do, and it’s appropriate for kids ages 2 and up. It’s so simple to do, and would be a natural addition to a morning or afternoon of drawing with markers.

Materials

  • White paper towels or white coffee filters
  • A Plate
  • Black marker/s
  • Water
  • Water Dropper

add water to black ink

We started by drawing a big quarter-sized dot on the paper towel, and then squeezed water on top of it. The colors that are released into the paper towel give you some clues as to what goes in to your black. In our case, there was a lot of green.

add water to marker on paper towel experimentAfter the black marker test, 3-year old N wanted to test the rest of her markers. She made a lot of predictions, and they all came out as expected (yellow appeared to be yellow and green was made from green dyes).

add water to marker on paper towel experiment

The red and pink, however, stumped her as they both released a pink color.

add water to marker on paper towel experiment ChromatographyAnd then there was a lot of fun in opening the paper towels up to reveal the levels of color that soaked through all the layers.

More Chromatography

For older kids, this slightly more advanced version of our kitchen experiment from Science Project Lab has some pretty cool results.

Kids will be amazed at the rainbow of colors released by leaves in this chromatography experiment shared over on TLC Family.

I like this coffee filter chromatography project from Kids Make Things.

Have you tried this experiment with your kids? Do you have a favorite paper towel/coffee filter project? What is the most challenging part of doing experiments with your kids?

Is it Magnetic? Testing Objects for Magnetism.

How was your weekend? We took a mini-vacation to play in the snow and I enjoyed a little computer break along the way. I thought I could get online with my phone, but it turned out that the reception was horrible and I’ve been completely out-of-touch! It was probably a good thing, as I could really focus on my family and be as rested as possible when my one-year old woke up, inconsolable, for 2 hours in the middle of the night! I also want to formally thank my good friend Melissa from The Chocolate Muffin Tree who checked in to make sure I was okay! How lucky am I?

I’ve been on a science kick lately. Maybe because my 3-year old is completely self-serve in the art department or maybe because I’ve checked every science for kids book out of our local library? If you’re in the market for a great book of kids science experiments for ages 8 and up, I checked out The Science Explorer Out and about: Fantastic Science Experiments Your Family Can Do Anywhere (Science Explorer Out & about)and it’s phenomenal. It was written in 1997 and looks a little bit dated, but the concepts are solid and it stands the test of time. If you’ve ever been to San Francisco’s Exploratorium or if you’re familiar with their publications, you’ll feel connected to this book.

magnet and water experiment materials

Today’s experiment is similar to one we’ve done before with paper clips +magnets (Traveling Magnets), and this takes it up a notch with a few more magnet surprises and discoveries. Here’s what you’ll need…

Materials

  • Glass or vase of water. Thin glass works better than thick.
  • Pipe cleaners and/or paper clips
  • Strong magnets
  • Scissors
  • Small magnetic and non-magnetic objects

pipe cleaners in water experiment

Cut the pipe cleaners up and add them to the vase of water and mix them up so the pipe cleaners sink. Three-year old N loved doing this step herself.

Using your magnet/s try to pull the pipe cleaners up the side of the vase. Once they reach the top, you can retrieve them or drop them back in.

It’s like fishing!

testing magnets experiment kids

This opened up a conversation about what would stick to the magnets, so I pulled out a handful of small metal and non-metal objects for us to test.

Meanwhile, my 1-year old enjoyed stirring the water and fishing pipe cleaners out with her hands.

testing magnets experiment kids

N understood that the magnet would only stick to metal and quickly ruled out rubber bands and post-it notes from the “Is it magnetic?” list, but we also learned that the magnet wouldn’t stick to ALL metals.

And that was a surprise!

magnets on hardwood floor nails

One of the funnest surprises, however, was when a magnet fell onto the floor and stuck to a hidden nail! We dropped the rest of our magnets onto the floor and flicked them from nail to nail, watching them dance from floorboard to floorboard.

One more thought — I kept a close eye on my 17 month old throughout because our magnets are so tiny — just a thought that you might want to do the same or find some big magnets for the under 3 y.o. crowd.

What did your weekend look like? Have you been able to take a technology break? And have you had any fun magnet discoveries?

 

 

Science Experiment: The Floating Egg

As I hovered the egg over a jar of water, I asked my 3.5 year old, “Will it sink or float?”and it reminded me of Dave Letterman’s funny sketch, “Will it Float?” Have you seen it? This science experiment is really easy to set up + clean up, and the lesson learned on the density of water actually stuck with my 3-year old daughter long after the experiment was over. Fun and success!

The set up

  • One egg
  • Clear container: I used a wide jar, but a tall glass would work and you won’t need as much salt
  • Water
  • A few cups of salt
  • Spoon to mix the solution

Step #1:

Place the egg in plain water and talk about whether or not it floats. Pretty simple — it most definitely sinks!

Step #2:

Start adding salt to the water. We added ours little by little, and tested the solution by adding the egg back into the water. My 3 year old poured while my 1-year old mixed. I love these moments when they work and play side-by-side.

Finally, it floats!

Baby Rainbow loved this step, as she could finally reach the egg, and had some fun picking it up and dropping it back into the water where it “bounced.”

The Science behind the Experiment

The egg won’t float in regular water because it’s heavier than the water. But adding salt to the water makes the water more dense than the egg, and it floats! We have a book called “Let’s Visit Israel,” and my 3-year old will talk about this phenomena when we reach the page about floating in the Dead Sea.

Taking it one step further

Steve Spangler Science has a great idea for dragging this out into one more step. Fill half of a tall glass (that an egg will fit in) with this salty solution and then slowly pour plain tap water down the sides of the glass, being careful not to mix the two solutions. Gently drop the egg in the solution and watch it sink past the plain water, only to stop on top of the salty water! How cool is that?!

Do you have a favorite science experiment?

This post is shared on It’s Playtime. 

Microwave Marshmallow Experiment

Have you heard of the microwave marshmallow experiment? It’s really simple and a fun way to explore how the volume of gas expands a marshmallow as it heats up. My kids also enjoy this experiment because it mixes science (+ fun) with a sugary treat.

The fun and simple microwave marshmallow experiment | Tinkerlab

Microwave Marshmallow Experiment Supplies

  • 4 (or more) Marshmallows
  • Paper Towel or Microwave-safe plate
  • Microwave
  • Paper to jot down observations (I’ll share my 3-year old’s observations in italics below)
For this microwave marshmallow experiment, we’ll microwave three marshmallows for different periods of time, and then  compare what happens to the marshmallows as they heat up, and then cool down again. This is an engaging way to involve children in scientific observation and discovery, it raises lots of questions, and doesn’t require a lot of prep or clean-up. Are you with me?

Step One

Microwave one marshmallow for 10 seconds and remove from the microwave. Compare it to an uncooked marshmallow and describe how it looks. How does it feel?

The fun and simple microwave marshmallow experiment | TinkerlabObservation: It’s small, shorter than the other marshmallow, but fatter. It’s gooey.

The fun and simple microwave marshmallow experiment | Tinkerlab

Step Two

Microwave the second marshmallow for 30 seconds and remove it. How does it compare with an uncooked marshmallow? What happens to it as it cools?

Observation: It’s a little bit larger than the other one. It got dry as it cooled.

The fun and simple microwave marshmallow experiment | Tinkerlab

Touching the second marshmallow.

The fun and simple microwave marshmallow experiment | Tinkerlab

Cool, a little hole showed up in the middle after it cooled down a bit.

The fun and simple microwave marshmallow experiment | Tinkerlab

Step Three

Microwave the third marshmallow for 50 seconds and remove from the microwave. Compare to and uncooked marshmallow right away and after it cools. How are they different? How does this marshmallow feel?

Observation: It’s huge and wrinkly and dry. It’s brown. That means it burned. That means it’s good to eat. Crunchy to eat.

The fun and simple microwave marshmallow experiment | TinkerlabYou can see all three marshmallows here. We noticed that the 30 second and 50 second marshmallows got hard and crunchy as they cooled, and N decided to taste them for a flavor comparison.

The fun and simple microwave marshmallow experiment | TinkerlabThe 50 second marshmallow was brown, crunchy, and caramelized. Have you ever tried astronaut ice cream? It had a similar texture.

The science behind the activity is explained clearly over here at The Exploratorium. In essence, the volume of gas in the marshmallow increases when the temperature increases, and then decreases as it cools down. The Exploratorium suggests not microwaving marshmallows for longer than 2 minutes, less you want a dark, stinky, burnt mess on your hands.

This project was inspired by a book we found at the library: Kitchen Science Experiments: How Does Your Mold Garden Grow?

Have you ever microwaved anything and been surprised by the outcome?

 

Science for kids microwave marshmallow experiment copy

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Add a Little Learning to Playtime

Today I’m celebrating the one year blogiversary of my friend Jillian over at A Mom with a Lesson Plan. One year! When you stop to think of about it, it’s amazing what can be accomplished in just one year. A preschooler travels into their first year in Kindergarten, a high school senior becomes a college student, and a mom can start a blog that inspires other parents (and have over 1300 Facebook fans to prove her impact…go Jill!). If you’re thinking about starting your own blog, maybe today is the day. It might not start out pretty, but just think about where you’ll be in one year!

A Mom with a Lesson Plan focuses on preschool sized activities for kids at home, so when Jill asked me to write about how we add learning to our playtime, I thought, “Awesome, because that’s what we do all the time!” Every time children play, they learn, and in turn, each activity is full of opportunities for more learning! So, today I’m sharing how we’ve been learning about measurement by watching our paperwhite bulbs sprout and grow…while wearing pajamas and making silly drawings in the kitchen, of course.

N planted the bulbs (found at Trader Joes) with my husband, and about a week later they sprouted. A couple days later they were noticeably taller, so I talked to N about measuring them, with the long-term idea of tracking their growth.

We have a chalkboard painted on a door of our kitchen where I wrote “Bulb 1” and “Bulb 2.” N is learning how to write and asked if she could draw the “2.” Of course! (++ adding more learning to our playtime). She asked me about the “1” that I drew, and said it didn’t look like a “1,” making this another learning opportunity to share that there are different ways to draw numbers. After sorting that out, she added some fab drawings of bulbs to the chalkboard.

Then we got to measuring. I brought out a ruler, which she has lots of practice using as a drawing tool, but not so much for measuring. We counted out the inches, one through 15 (it’s a long ruler!), and I showed her where to look for the inch markers. She’s been really curious about how analog clocks work, and I suppose this touches on a similar concept of recognizing numbers as symbols that represent something else.

We added the numbers to our chart. As you can see, it’s highly technical, so email me if you need specifics 🙂 N is only 3 1/2, so her grasp of charts is limited, but she enjoyed the process of measuring and documenting, and of course drawing!

Children learn through play. It’s inevitable. What does learning look like in your home or school?

More ideas for adding learning to playtime can be found by these bloggers who are are celebrating with Jillian today. You can click directly to their posts through the linky below.

 

Experiment: Make Fake Snow

How to Make Fake Snow

We’ve been making fake snow, which is equally fun for kids like mine who celebrate winter under a sea of palm trees or those who are house-bound by piles of real winter snow.

How to make fake snow: a cool experiment with kids  |  Tinkerlab.com

Note: This post contains Amazon links for your convenience.

How to make fake snow: an experiment with kids | Tinkerlab.com

Supplies

How we did it

We started by pouring a small amount of sodium polyacrylate, or fake snow  into a large tub. This material used to make fake snow is non-toxic (although you wouldn’t want to eat it), and you’ll recognize it as the same stuff used to absorb liquid in disposable diapers. I picked up a small bag of “snow” at RAFT, but I’m curious about pulling apart a diaper to mine this fun-to-play-with polymer. If you try this, let me know!

I almost always fall into the camp of “you can always add more,” so we started with just a little bit. When I bought the fake snow, the woman working there joked about a desire to fool her parents by pouring the powder all over their lawn in the middle summer, only to be greeted by a sea of snow once their sprinklers went off. This vision sat firmly in my mind, so I poured gingerly, not knowing just how much the powder would expand.

How to make fake snow: an experiment with kids | Tinkerlab.comIt turns out that it does in fact expand, but nothing to worry yourself about!

one year old drawingMy one-year old was too little for this activity, and I was happy to situate little sister with an activity of her own. She was happy.

How to make fake snow: an experiment with kids | Tinkerlab.comA request came in for a spoon and a bowl to fill. The project is expanding! I asked N to describe the texture for me, and she said it was cool and wet. I agree.

How to make fake snow: an experiment with kids | Tinkerlab.comWorking side-by-side, I now live for moments like this.

Mix colors into your fake snow

How to make fake snow: an experiment with kids | Tinkerlab.comWhen playing with white snow seemed to run its course, I introduced Liquid Watercolors and a plastic pipette. I limited N to two colors (mostly to keep the crazy factor down) and she requested blue and magenta.

toddler sharpens pencilsMeanwhile, little R learned a thing or two about sharpening pencils.

How to make fake snow: an experiment with kids | Tinkerlab.com

This turned into a cool color mixing experiment. It was fascinating to see how many of the “snow” pellets absorbed one color or the other, and cast an illusion of purple when viewed at once.

Make Fake Snow with a Friend

How to make fake snow: an experiment with kids | Tinkerlab.comThe next day our neighbor, J, came over for another snow-making session. J likes a good experiment as much as my daughter does, and the two of them scooped, squeezed, stirred, mixxed and poured until they had to be pulled away for dinner!

What do you think? Will you try to make fake snow?

How to make fake snow: an experiment with kids | Tinkerlab.com

Resources

Learn more about how disposable baby diapers work from Imagination Station

Watch Steve Spangler demonstrate Intant Snow on the Ellen Show. I can’t help but smile at Ellen’s reaction to Steve. She’s hilarious.

Note: Use your best judgement and due diligence when using these materials with young children.

This post is shared with It’s Playtime

Straw Air Rockets

This is a project we had fun testing with Kiwi Crate, a new hands-on kit of monthly projects that launches  soon. Follow their fun blog for more.

We’ve been having the best time shooting air rockets out of milkshake/boba tea straws (found in our supermarket) The baby enjoyed seeing the rockets fly overhead while chasing them around the room, while my three year old challenged herself to shoot these far and wide.

Materials

  • Milkshake straws
  • Copy, Printer, or other light weight paper
  • Transparent Tape

You’ll want to roll the paper into a tube that will cover most of the straw. Cut a piece of paper large enough to roll around a straw, leaving a 1″-2″ tab that can be taped closed over the other side of paper. Cut another small piece of paper and attach it to the end of the paper tube. Seal it shut. See photos for more direction.

Place the paper tube on top of the straw, move into a wide open space, and blow. What you don’t see here is my one-year old laughing hysterically each time a paper tube shot over her head.This was the third day we played with these over a three week period, and it still caught my kids’ attention. If you decide to try this and it doesn’t work, the worst thing that could happen is that you’ll be stuck with some milkshake straws that may need to be put to work in a more traditional way! Mmmmm.

Have you ever tried to make a paper rocket? What do you think?

More rockets

This project is shared with It’s Playtime, Running with Glitter

“E” is for Experiment

My bloggy friend Deborah over at Teach Preschool just reached her 20,000th Facebook fan. Can you imagine? TWENTY-THOUSAND! She’s awesome in so many ways, and is especially extraordinary in that she runs a preschool and also finds/makes/squirrels away time to tweet/facebook/blog and generally keep the whole online preschool community together in one special place. Not to mention she’s one of the kindest bloggers out there.To celebrate this big social networking milestone, Deborah invited her early childhood education friends to contribute a letter, in the form of a blog post, to the “ABC’s of Teaching Preschool.” Given the nature of my blog, “E” for Experiment is what I have for you today. Oh, how I love a good creative experiment!

So can you imagine my surprise when I spotted this very truck TONIGHT on our evening stroll? The kids were in the wagon, happily playing with handfulls of leaves, and I did the biggest double-take. Circled back down the street and snapped this shot.

Serendipity, right?

Experimentation is at the heart of learning. When children are curious about something new they may ask about it, test it, try to figure it out, look at it from a different perspective, fail, or try something different. Last night I watched my almost one-year old work at putting a lid on a bottle for close to ten minutes. She flipped it over, moved her hand to get the right grip on the lid, missed the mouth of the botter, made contact, succeeded, put it down to clap (!), and then did it all over again.

About eight times.

Experimentation.

Here are three of our all-time favorite kitchen experiments–a little sample of what makes us happy at Casa TinkerLab. There are MANY more — just type “experiment” into the search bar and see what comes up! If you have a favorite experiment, I’d love to know what it is — by no means have we exhausted the possibilities.

Corncob Popcorn Experiment

Perfect for fall. Collect some dried corncobs and pop them in the microwave.

The Butter Experiment

Grown-ups may have to do most of the work, but the results are pretty spectacular.

Vinegar and Baking Soda

This project is so much fun that you’ll want to buy a gallon of vinegar in preparation for the requests for “more.”

If you’re not already a Teach Preschool Facebook fan, click right here and join the 20,000+ party.