The incredible creations of some of the most iconic toys in history happened by chance. During World War II, a naval engineer accidentally creates an iconic spiral toy that walks down stairs, when he’s trying to come up with a way to protect ship equipment from damage. At the same time, an engineer is trying to invent a synthetic rubber for the war effort and instead creates a strange putty that becomes another world-famous toy. It’s the origin stories of these toys and more, and the genius entrepreneurs who brought them to the world.