Combine heavy work, tactile stimulation and visual stimulation all at once with Sparkle Putty, a color-changing putty that provides hours of fun! Great for kids with low tone, ""gorilla grips", and fidgety fingers, this soft-resistance putty can be pulled, twisted, rolled, stretched and manipulated for hours. Strengthens hand and finger muscles and serves as a great warm up before handwriting. Place the putty in the freezer or refrigerator and then watch it change colors from purple to blue as it is manipulated, enthralling kids and encouraging repeated play.