Do kids play with Play Doh anymore? Just in case parents forgot, today is National Play-Doh Day. It recognizes a great childhood play thing invented in the 1950s.

It was a simple invention. The story goes a school teacher wanted a safe modeling clay for her pre-school class. Her brother in law worked at a Cincinnati chemical company and asked if he could come up with something. His creation was basically flour, water and food coloring.

Hasbro Toys has a slightly different version. They say scientists at a Cincinnati soap and cleaning compound company were working on a dough-like cleaning product and stumbled on what came to be known as Play-Doh. It wasn’t a very good cleaner, but a great play thing. And as long as you didn’t eat too much of it, it was usable over and over.