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Next time you get set to make hot cocoa on a chill winter afternoon, consider this: if you make your own marshmallows, you can mix up some very interesting third grade chemistry lessons while you're at it!
Here's the deal: marshmallows depend on gelatin, a common household ingredient. But for third grade scientists, gelatin is also a great way to demonstrate how molecules can rearrange to change matter from one state to another. Follow the directions below to see just what can happen when gelatin meets some sugar, cornstarch, and heat.