This gootonium putty transforms from green to blue. These amazing color-changing powers depend on temperature. The putty starts out green but as you play with it, heat from your hands change it to blue-ish teal. Plus, it has all those classic putty skills, like bouncing and peeling comics from the newspaper.- Gootonium color changes with temperature. Heat it up in your hands or quickly cool it down with some cold water.- Ideal for fidgeting, sculpting, and stretching, providing endless hours of entertainment.- Safe and Non-Toxic: Made from high-quality, non-toxic materials20 grams of glorious putty in a 4×4 hangable package12-piece point-of-sale