 CBS's Jim Crisula is inviting us to wish a happy birthday to the world's top-selling toy. It's been giving us joy and aggravation for 50 years, either defeat or a satisfaction of accomplishment. The Rubik's Cube was introduced to the world in 1974 by Erno Rubik, a Hungarian architect, designer, sculptor, and retired professor. Problem-solving, it's a very basic activity of human mind.