Flarp - Potty Putty My grandson will be sooooo happy. 1 c. white glue (Elmer's, Tacky, etc.) 1 c. water, food coloring, 1 c. warm water, 1 1/2 tsp. borax powder Mix glue with water in large bowl. Add couple of drops of food coloring Set aside. In small bowl, mix warm water with Borax. Add to glue/water mixture and stir for 2 minutes. It will go from liquid to a nasty stringy mass, then at the end of 2 minutes it will be putty! Knead to smooth putty out.