Video games took the world by storm in the late 70s and it wasn't long before the technology was incorporated into a number of handheld devices that promised to provide the same thrill. Most didn't, usually because they weren't all that challenging or versatile. Merlin was the exception. Introduced by Parker Brothers in 1978, the device allowed you to play a number of games and even compose music. There was enough magic within Merlin to make it an instant hit.