Do you know who Hilary Page is? Neither did I until yesterday. He is the genius behind a great number of children's toys -- including the "Self Locking Building Bricks" that you and I know as Lego (pictured).
Page was a pioneer in using plastics for children's toys (go plastics!). He took out a British patent for his blocks in 1939, selling the rights to Lego sometime in the late 1940s.
You can learn more about the inventor here.
You can read about his original building bricks here.