Balloon Rockets - I've done this in several science camps I've conducted. Kids have fun with it. But, when the balloon deflates it may fall off the straw because it's surface area changes - another good thing to show and explain to kids.
DIY toy garage made from toilet paper rolls and cardboard boxes - toilet paper roll crafts for kids. The perfect arts and crafts project that will never go to waste and perfect for your childs car collection to put on display.