Patti Galvan with the American Chemical Society is here to help us 'get our hands on chemistry.' We learned the secret science of self-inflating balloons. Kidd and Julie also got a little surprise.

pins down its balloons, begins to inflate them, and invites the public to watch. We were there—and here are some of the things we learned. 1. For 43 years, the balloons were designed and made in ...