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.
Refraction Of Light - Simple Water Experiment (Video)
Layers of the Ocean: Under the Sea Science Activities - Learn about ocean layers & zones with this creative science activity kids & teens will love! Fun way to discuss marine animals and how light travels thru water -- STEM for kids
Cool Science Experiments for Kids – Get your kids interested in science with these 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.