"Silly putty" refers to a type of pliable material or toy that can be stretched, molded, or bounced like a ball. It is often used for fun and entertainment, and is known for its silly and playful nature. Full definition
That's approximately 5,500 tons of Silly Putty eggs sold since 1950. (entrepreneur.com)
The researchers say this indicates an upper crust made of a mixture of rock and ice — in which small craters could be carved — supported by a more viscous mantle of ice lower down, which would allow the biggest impact basins to relax away with time, like silly putty returning to its original shape. (sciencemag.org)
Doubleday bit and, soon, a writer for The New Yorker stumbled across Silly Putty in one of its shops. (entrepreneur.com)