Pro tip: Once you're done playing with the slime, store it in an airtight container. It should remain stretchy for a few more days. Now that you've mastered the basic slime recipe, it's time to ...

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 ...