Silly Putty ( originally called nutty putty ) is a silicone plastic `` clay '' , sold as a toy for children by Binney & Smith Inc. . Silly Putty ( also marketed by other companies as Thinking Putty , Bouncing Putty , Tricky Putty and Potty Putty ) , is the Crayola-owned trademark name for a class of silicone polymers .