Silly Putty ™
I completely missed the news that the patent held on what is commonly called Silly Putty ™ expired. I’m not a chemist so I don’t know that I’ll start making my own anytime soon. However, there is a small industry of places that you can purchase it from. There is a fella who goes by the moniker ‘Crazy Aaron’ that has been selling Thinking Putty on the web. He’s got lots of great colors, some the glow in the dark and some that are heat sensitive (they change color with heat/touch). I think I need to acquire some for myself.