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.
glow in the dark slime. Would make a great halloween party favor. Ingredients: 1 - bottle of clear or blue gel Elmer's glue 1 cup of warm water tablespoons of glow-in-the-dark paint Green Neon Food Coloring 2 teaspoons of Borax cup of warm water
GAK - Elmer's Glue Borax Recipe Spangler Science- Needs glue, water & borax. You mix the glue and water together and then add as much of the dissolved borax as you want to get it as slimy/firm as you want. Less borax= slimier. More borax= firmer