Write secret messages and watch them disappear before your eyes with this incredible putty from Crazy Aaron's Puttyworld. You can doodle whatever you please on this green putty with the included Glow Charger and watch it show up in blue before vanishing! Crazy Aaron's putty is non-toxic, won't dry out, and won't leave a sticky or slippery residue on your fingers, so it's great for stretching, molding, and playing by kids and adults alike!