[KenWittlief]

Silly Putty is silicon oil and Borax. It was invented over twenty years ago, in fact the patent has now expired, and you can buy it in 50 lb boxes from Dow for $350 a box. In all the years since it was invented, no one has come up with a real use or purpose for the substance!

It has unique properties:

1. if you hold it in your hand it will slowly melt into a blob
2. but if you shape it into a ball it will bounce without deforming
3. but if you smack it with a hammer it will shatter like a brick

but since it has no practical use, these facts are useless!