1/2 cup white school glue
1/4 cup water
Food coloring, optional
1/4 teaspoon baking soda
1 to 2 tablespoons contact lens solution
Mix the glue and water in a bowl
Add food coloring if desired
Stir in the baking soda
Add contact lens solution a little at a time
Mix until the slime starts to form
Knead the slime with your hands until it is stretchy
Add a few more drops of contact lens solution if it is too sticky
Add a little more glue if it is too stiff