DIY flubber recipe for kids. ♦♦♦♦♦ 3/4 cup cold water ♦ 1 cup Elmer’s glue ♦ liquid food coloring ♦ 1/2 cup hot water ♦ 1 teaspoon borax (you can find this in a box in the laundry aisle) ♦♦♦♦♦ mix together the cold water, glue, and food coloring. set aside. mix together the hot water and borax, until the borax is completely dissolved. slowly add glue mixture to borax mixture. mix well. pour off excess water.