Safe Chemistry Projects for Kids

I got a question from a reader concerning the safety of the charcoal crystal garden This is a great classic science project, where you pour household ammonia, salt, and laundry bluing over charcoal briquettes to grow a multicolored 'garden' of interesting crystals. I mentioned that the materials for the project were toxic, so adult supervision should be used when trying this out with younger kids. The reader wanted to clarify that the project was safe, since the materials are common household chemicals. Yes, the project is very safe. Yes, the chemicals are toxic. They are safe to pour down the drain, and safe to use as directed, but you don't want children drinking ammonia or licking charcoal briquettes. When I use the word 'toxic' it's hard to tell if I mean 'touch-it-and-you-will-die' toxic or 'don't eat it or you might or might not get sick' toxic. So... I have two lists of chemistry projects that might help alleviate concerns. There is a list of home chemistry projects, which list all of the ingredients required for each project and the ages for which the project is appropriate. Also, there is a list of chemistry activities for kids, which is a collection of projects most kids can do by themselves or younger kids can try with adult supervision. Have fun!
Photo: Making slime is one of the safest chemistry projects. It's also a lot of fun. (Anne Helmenstine/About Chemistry)