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.
Making a rain cloud in a jar is a great experiment for kids that teaches them about the weather. My girls loved the original experiment so much that I sought recreate it with a fun twist. My girls w Más