What does a bee use to brush its hair? A honeycomb!
If you're a kid, or a kid at heart, the Kids Environment Kids Health website is a great resource for you. It has jokes, like this one, as well as engaging games, videos, and experiments. All the information is vetted by experts at the National Institute of Environmental Health Sciences.
Topics include everything from how pollution affects our health to recycling, and more. It even has lesson plans and other resources for K–12 teachers.