Pour warm water into a small bowl and mix in Borax. Stir until the Borax is dissolved.
Move your borax mixture to a bigger bowl and add food coloring and glitter (if you choose) glue, shaving cream, and soap. Mix well to combine.
Remove slime from the bowl and knead, there will be a little liquid residue left in the bowl.
Store your fluffy slime in an airtight container.