I need some ideas on science projects for 6 year olds?

Well, you could take a few pinto beans a zip lock and a wet napkin and show him how it grows...tape it to a window and watch the daily changes...get a flash light and go in to dark room with a mirror and show how his eye reacts to light...teach density and how oil will come to the surface when oil and water are mixed...make tornadoes out of two liters and water...