Goop

Mix glue, 1 1/2 cups water and food color until glue is dissolved.

Dissolve borax and 1/2 cup water until borax is dissolved.

Add borax solution to glue solution

Knead goop for about 5 minutes.

The food color may stain fabric, so don't get goop on your clothes -- use small amounts of the food color to reduce this risk.