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. A great stocking stuffer! - Safe and Non-Toxic: Made from high-quality, non-toxic materials 20 grams of glorious putty in a 4x4 hangable package 12-piece point-of-sale