SubjectsGeneral FactsFactsIP FactoidsWeird Facts No one knows what Play-Doh is made of. By IP Factly - Mar 8, 2016 0 6 Share on Facebook Tweet on Twitter Play-Doh by mtkopone/CC BY 2.0 Play-Doh has been around since 1956, when it was accidentally discovered by a wallpaper cleaner, but no one knows what its ingredients are. All Hasbro is saying is that it is made mostly of water.
