Cup stacking is just one of the entertaining games that kids can play with simple plastic cups. Discover other plastic cup activities to try with your kids.

Fill two wide cups about 2/3 full of hot tap water. Quickly place a tall clear plastic cup over each of the cups. Place a piece of ice on the top of one of the cups and wait about 2-3 minutes. After ...

1. Place 1 tablespoon of water in a small plastic cup. Add ¼ teaspoon of borax. Mix until as much borax dissolves as possible. This is your borax solution. If you would like your slime to be a certain ...