Purple on contact yet drying clear, elmer's Disappearing Purple school glue sticks help you see exactly where you're sticking your charts, pictures, and more the glue stick applies smoothly with a Disappearing Purple formula, making it perfect for kids just learning how to glue. Add on its nontoxic, acid-free formula and you can see why these school glue sticks are the ideal adhesive for classrooms, homes, and youngsters.