Dancing raisins activities. Lots of fun experiments. I have done this experiment, and seen the entire class become silent out of curiosity. It is a great engagement piece for a lesson, and it can be hands on if you ask for volunteers!
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, shine pennies then turn them green, and catch ice on a string using supplies you have around the house. Smart is the New Cool!