Did you know that the Play-Doh paste was initially invented to clean wallpapers in the 1930s in Ohio? Some classroom kids has the brilliant idea to use this mix of flour, water, salt, boric acid and mineral oil as a modeling paste. It was then reworked and marketed as a toy to Cincinnati schools in the mid-1950s. Play-Doh was demonstrated at an educational convention in 1956 and bought by department stores. The rest, as they say, is history. If you wish to know more, go and give it a try in February at the Victoria & Albert Museum for Kids in London (program here).