The Superman accessory kit for the Thingmaker toy from Mattel, circa mid-1960s.
First introduced in 1964, Thingmaker was an activity toy that allowed kids to create their own rubbery toys. The toy included metal moulds, Mattel's Plastigoop liquid plastic, and an open-face electric oven. The Plastigoop was poured into the mould, which was then heated to 390º Fahrenheit (199º Celsius)! After the mould cooled, kids had their own rubbery toy.













