Add glue and water to a large mixing bowl, and stir to mix.
Add in baking soda and stir to combine.
Add the foam shaving cream to the glue mixture. Stir to mix all ingredients well.
Add 1 - 2 drops of food coloring and stir to combine.
Add the contact solution and mix with the spoon until slime forms and pulls away from the sides of the bowl. Knead with your hands to help incorporate the contact solution into the slime.
If the slime is still sticking, add 1/2 tsp of contact solution at a time until it is no longer sticky.
Notes
Costs for this craft will vary - if you make a lot of slime like we do and buy the ingredients in bulk, it can cost pennies!