Elmer's Disappearing Purple School Glue Sticks are a fun way to attach items to paper, display board, cardboard, foam board, photos, and much more. The glue is purple when first applied, so it's easy to see, then it dries clear. For convenience, this glue is also specially formulated to be washable, non-toxic, and acid-free. Get smooth, clump-free results at home, school, or on the go with Elmer's Disappearing Purple School Glue Sticks.