Rain Bottle ~ fill a dry empty bottle with a box of toothpicks. Add rice (uncooked) to the bottle leaving an empty space of about 1 inches at the top. Seal the lid. As you gently turn the bottle, the rice falls through the toothpicks, sounding like rain.
This stuff is amazing. Mix 2 cups of cornstarch and 1 cup water in a bowl. To color it, add a few drops of food coloring. This defies Newton’s third law of motion–for every action, there is an equal and opposite reaction.