Stapelspiel describes a set of play moulds that are suitable for children. The play moulds are made from 100% recycled plastic waste and are the result of a circular concept. The aim is to encourage an increase in recycling processes and to demonstrate the creative potential of plastic waste. The colouring and colour structure of the play forms resulting from the recycling process stands out from conventional recycled materials. Due to the mono-material and the embossing of the recycling code, a complete return to the circular economy is guaranteed.