The Ketchup Experiment! Kid friendly site with lots of neat experiments! It has one that makes a rocket out of a film canister, which would be good for an grade space unit, but it has to many kid friendly expiriments. Great site for any science teacher.
Fun Science Experiment: Pour whole milk and add red bull - let sit 5 minutes and the acid in the red bull will cause the protein in the milk to separate - precipitate/chemical change. Maybe my kids won't want to drink Red Bull after this experiment!
Cool Science Experiments for Kids – Get your kids interested in STEM ? science, technology, engineering, and math with these easy science projects using physics and chemistry. Create a glitter tornado (Cool Crafts For School)