Chemistry in the kitchen can be rated G
When I took organic chemistry in college the first time, we had to make this stuff for one of our labs. All I remember from the experiment is that I made it in my dorm room, and I thought it was really cool unlike most of the stuff I did in orgo (are you beginning to see that I hated organic chemistry like a bad rash?). I made the "stuff" in a plastic bag, and it looked like a liquid, but it turned into a solid when you put pressure on it. As soon as you took the pressure off, it was a liquid again. I wanted to make this stuff for my nephews, so I looked it up and, thankfully, found the recipe. Because some of you are interested in these kinds of things, I thought I'd share.
Chem in your home. It's under ooblek. You can also make Gak (I used to make this with my mom for her first graders), silly putty, and flubber.