What is a toy? How can a toy be more than an object of entertainment? What does it really reflect? Millions of toys have been produced across the world, for many years, but how do great designers become involved in this world? This dissertation looks at how architects and designers have treated the subject. How do they view children? What are their ambitions in terms of toy design? What do they offer children through their creations and what does play really mean to them? For these designers, do toys represent an outreach tool, an object of transmission, a means of expressing their own aspirations?