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Pet raisins!

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My son has a soft spot in his heart for nearly anything even remotely huggable. I have to be careful about taking him out on wet days, as we can (and have) easily end up spending our afternoon building little twig-and-leaf hotels for all the worms we find wriggling around on the sidewalk.

Unfortunately for Darren and his warm, gooey marshmallow heart, our apartment building is pet-free. This weighs heavily on Darren, so I was especially excited to share this activity with him!

To make pet raisins, start with the driest, thinnest, wrinkliest raisins you can find, and a gallon-size glass jar.

Fill the jar about 2/3rds of the way with water and white vinegar. (I am not careful about the proportions. It is easy enough to keep tweaking it as you go.) Next, add the raisins to the vinegar solution, and then slowly add baking soda. Watch as the vinegar fizzes and bubbles like soda pop, and explain that the baking soda and vinegar are reacting with one another to make these little bubbles of CO2. These are no ordinary bubbles! Watch as they collect on the surface of the raisins and slowly lift them to the surface!

Darren and I had a blast watching our raisins swim around in their jar. They kept moving around for at least an hour, until the raisins became to soggy and heavy to float anymore. We were sad to see them go, and can’t wait to try this activity again with friends!

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Petting our raisiny little friends!

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Written by GRSeim

December 20, 2011 at 10:09 am

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