Yeast and Sugar Experiment

yeast experiment

yeast experimentI’ve been baking bread just about every day for the past three weeks (nothing too crazy since it’s all done in the bread maker), but last week my 3.5 year old and I got into a discussion about the properties of yeast.

We like to tinker and  experiment – big surprise, I know — and decided to see what would happen if we mixed yeast with warm water. N took this job very seriously, poured the water into a bowl, added a couple teaspoons of yeast, and waited a few patient minutes before she said, “it makes a brownish color.” True, and to make it bubble like it does in bread, we needed to activate it with sugar.

So we took about fifteen minutes to clear some space and set up what would become the Yeast + Sugar Experiment.

What’s so great about an experiment like this is that it’s easy to do with household materials, and it’s ripe for authentic child-generated questions and observations. When I asked what she thought would happen if we added sugar to the yeast she said, “I don’t know! Let’s mix them and find out!.” And when we finally attached the balloon to the bottle she wondered, “will it fill up all the way and blow off the bottle?”

yeast experimentWhat you’ll need

  • Sugar, 2 tablespoons
  • Active Dry Yeast, 1 packet or 2 1/4 tablespoons
  • Balloon
  • Warm water (105-115 degrees F, 40.5-46 degrees C)
  • Mixing bowl + funnel (we used a cocktail shaker instead)
  • Bottle that you can fit a balloon over

yeast and sugar experimentMix the yeast and sugar into the warm water and stir. I noticed that N was sniffing the concoction and asked her what it smelled like. She said “poop.” I could see what she was saying. Consider yourself warned.

Once it all dissolves, pour the mixture into the bottle and cover the bottle with the balloon.

yeast experimentAfter a few minutes you’ll be amazed by something like this!

yeast experimentN wanted to feel it as it filled with air. She noticed the balloon was getting bigger and wanted to know how big it would get.

yeast experimentMy handy-dandy ship captain sister (no joke — that’s her job!) was visiting, and put herself right to work as chief measurer.

yeast and sugar experimentOnce the bottle filled up completely, we moved the whole operation to the sink. The bubbles were slow-moving, and there was nothing to worry ourselves with, but N enjoyed pulling the balloon off and watching the foam slowly pour over the bottle’s top.

As we went through the process, I thought of a few fun extensions for older kids or those who want to take this further. You could play around with food coloring/liquid watercolors, have a few bottles going at once and compare the results of different sugar:yeast ratios, or compare the results of different water temperatures.

I found my recipe at The Exploratorium’s Science of Cooking series, where we also learned that as the yeast eats the sugar it makes carbon dioxide, which is essentially the same process that yeast goes through in our bread dough.

Mmmmm. I’m off to eat some whole wheat cranberry walnut oat bread. Toasted. With butter and Maldon salt. How do you like your bread? And have you played around with yeast concoctions?

This is shared on It’s Playtime

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Incredible Growing Gummy Bears

growing gummy bear.001

Here’s a fun experiment that hardly takes up any room, isn’t messy, and your kids will love it!

Here’s how we landed on this experiment: We stopped at the drug store for baby wipes, and 3.5 year old N bombarded me with five minutes of this… “Mom, stop! You have to see this. Mom, can you get me this light up candy cane/cup shaped like a fairy/snow globe. Wait!!! I really want it!” I normally adore her enthusiasm, but I have a short wick for the begging and pleading for random odds and ends. Pair that with a toddler who insists on standing in the shopping cart and you get the picture of me yearning for a hot cup of coffee and a copy of US Weekly! If you ever wondered if I’m actually raising independent thinkers, the answer is most definitely “yes!” So, on our way to the check-out, we walked down the candy aisle. Dumb move, I know, and N quickly managed to pull a bag of gumdrops off the display with a request to make gumdrop sculptures. 

Ack. She knows my weak spot for creative projects! Um, yes, we can buy the gumdrops for the sake of your growing mind. And with that, she also pulled down a pack of gummy bears. I remembered reading about a gummy bear experiment, and that’s how we ended up bringing these little jelly woodland creatures home with us.

The experiment is easy. We each had to eat one, of course, and then N chose a couple to add to the water. I asked her what she thought might happen to them after being submerged, and she said she didn’t know. After a couple hours we checked on them, and found them covered in tiny bubbles. We compared them to one of the dry originals, and the wet bears were a bit plumper!

I left N in the kitchen while I put her baby sister down for a nap, and returned to find her nibbling on one of the plump bears!! She had this to say, “I know I wasn’t supposed to eat the bear, but I had to also compare the way they taste to see if they tasted the same.” How could I be upset with that?

In all, we let the bears sit in water for three days, and you can see the size difference in this image. The gummies kept expanding and then finally seemed to fall apart. If you try this at home, and want to do a taste comparison, be sure to refrigerate your gummy bears so they don’t grow bacteria. Yikes!

The Science behind the Experiment

Gummy bears are made up of water, sugar, and gelatin. Like a sponge, gummy bears will absorb water but the gelatin keeps the bears from dissolving in the water.

 

Water Scooping for Babies

Sensory Play: Water Scooping for Babies

Sensory Play: Water Scooping for Babies

While my older daughter tore up the grass with the Slip ‘n Slide, I set my 10 month old up with a bucket of water and some measuring cups. And she got right to work, filling and emptying the cups. It was interesting to watch her attempt to fill the cups when they were upside down, and then exciting when she figured the “problem” out and corrected for it.

And then, presumably, she was proud of one of her many accomplishments.

The provocation is simple — Set your project up outside (since most babies thrive when there are airplanes to track and birds to listen for) and provide your baby with a low bucket of water. Tools are optional. And then see what discoveries come about.

Any other ideas for playing in water with babies?

 

Outdoor Water Painting Experiments

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My friend Diana sent me these amazing photos of her son (almost 2 1/2 at the time), experimenting with water painting. She offered him a couple containers of water and a paintbrush and gave him free reign to paint away. I love how he was able to take these simple materials and experiment with them in multiple ways. He’s enjoying the process of painting while learning about the properties of his materials, making comparisons, and experiencing the effects of gravity.

He squatted down low to get close to the action. The wood deck and porous tiles help capture the full effect of the water’s path.

He stood up high to flick the brush Jackson Pollack style, and discovered how distance could change the process.

He bent over to paint directly on the wood.

And then he painted on the tiles. A different texture with another look.

And finally, he painted on chalk drawings.

This is a beautiful reminder that creative thinking, exploration, and experimentation don’t have to come at an elaborate cost (of time or resources). If the weather is nice where you are, consider taking some water and brushes outdoors with an invitation to experiment. Other surfaces that absorb water nicely are bricks, terra cotta pots, and sidewalks.

What outdoor painting projects have you enjoyed?

Please feel free to share you photos in the comment section.

This post was shared with It’s Playtime, Childhood 101


Traveling Magnets

i see you

While we make a lot of art in our home, I cherish any project that develops creative and critical thinking skills. I’m attracted to fun activities with an experiential twist, and I’ve noticed lately that we’ve been dabbling in the worlds of science, literature, and dramatic play, as much as we have in that of art. For this simple experiment, we explored how magnets can travel through water and glass, speculated on how we could get the magnets out of the jar, exercised fine motor skills, had to problem-solve in order to figure out how to get the paper clips out of the water, and experienced moments deep concentration (my favorite!). And if you look closely, you’ll notice that N had to put her treasured lollipop down in order to play. A sure sign of child approval!

First, N picked up some paper clips…

And dropped them into a jar full of water. Then she used a strong magnet to pull each of the paper clips up the side of the jar.

Got it!

I’m learning that my daughter likes to try new things, figure them out, and then move on to the next thing. So she was highly engaged with this for the first three of four paper clips, and that was it. While I would have loved to see some sustained attention, it’s always nice when these short-lived activities are also incredibly easy to set up. In this case, set up was a snap (jar + water + paper clips + magnet) and clean up was next-to-nothing.

And we learned that magnets can travel through water and glass!

Two thumbs up from the child and the mom!

Special thanks to Amy at The Wonder Years for the inspiration!

What magnet games do you like to play?