There are several colours available within this assortment and unfortunately it is not possible to request which one you would prefer. The putty is thermochromic—which means it reacts to heat—so the warmth of your hands is the only thing you need to change the putty from purple to blue or from orange to yellow. Your body heat changes the color in minutes! Putty can be kneaded, stretched and bounced. With putty you can make the best things and let your creativity run wild. For hours of fun! Putty in a can. In a handy tin in which you can neatly store it again. You can easily knead it