DIY Liquid Sidewalk Chalk Paint Ingredients: A muffin tin Paint brushes 1 cup of cornstarch 1 cup of water food coloring Recipe: Mix the cornstarch and water in a small cup or bowl. Pour into muffin tins. Add drops of food coloring to each well
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.