1. Mix 1 tsp of Borax with 1/2 cup of water and shake or mix it very well until the Borax has dissolved.
2. In the second container, mix 1/2 cup of water with 1/2 cup of washable school glue. Add food coloring or glitter (optional) and stir with spatula until mixed.
3. Slowly, a little at a time, add in the Borax/water mixture until the slime starts to come together. You will not use all of the mixture. Finally, have your child knead the slime until it holds together!