Silly Putty

Koosh Balls and Silly Putty - Bernie DeKoven's article on the toys.
Old Silly Putty Ad - Advertisement that appeared in a comic of 1964.
Silicone Bouncing Putty on the Web - Mailing list, how to order large quantities, ingredients, and people's creations.
Silly Putty University - Official site, with contest, history, available products, how it's made, and news.
Tim's Putty Page - Background information, scientific experiments, pictures, and data sheets.