1/2 cup white school glue
1/2 cup water
1/2 teaspoon baking soda
1 to 2 tablespoons contact lens solution
Food coloring, optional
Mix the glue and water in a bowl
Add food coloring, if using
Stir in the baking soda until combined
Add the contact lens solution a little at a time
Stir until the slime starts to form
Knead the slime with your hands
Add a little more contact lens solution if the slime is too sticky
Store the slime in an airtight container