Ingredients:

1 cup cornstarch
1 cup baking soda
Food coloring
Water

Mix the cornstarch, baking soda and a few drops food coloring in a plastic bowl, using a popsicle stick. Gradually add 1 cup, more or less, of water until the mixture becomes smooth. You should be able to pour it like a thick liquid and squeeze it to make it solid.

WARNING!!! Do not pour down the drain, as it will clog.