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Ian's Putty Page
http://www.rit.edu/~ixs0792/putty/
Pictures of Silly Putty, and safety advice from Dow Corning.
Koosh Balls and Silly Putty
http://www.deepfun.com/koosh.html
Bernie DeKoven's article on the toys.
Old Silly Putty Ad
http://www.steveconley.com/superputty.htm
Advertisement that appeared in a comic of 1964.
Silicone Bouncing Putty on the Web
http://www.vern.com/putty/
Mailing list, how to order large quantities, ingredients, and people's creations.
Silly Putty University
http://www.sillyputty.com/
Official site, with contest, history, available products, how it's made, and news.
Tim's Putty Page
http://terror.hungry.com/~tspencer/putty/
Background information, scientific experiments, pictures, and data sheets.