Toyman, also known as Winslow Schott, is one of Superman's enemies. His gimmick is that all his weapons look like toys.
The Toyman is also a skilled robotics engineer, having built numerous robots, some of which even stood in for Toyman himself.
The second Toyman was a man named Jack Nimball, for a brief period in the 1970s. However, Schott soon killed him and resumed his career as Toyman.
Toyman was slightly softer in Lois & Clark, creating Space Rats to destroy Christmas & make a lot of money, although after visiting an orphanage he changed his ways.
In the 2000s, a Japanese boy named Hiro Okamura identified himself as Toyman, providing a high-tech toy-themed spaceship to Superman and Batman. This version was later revealed to be a robot created by the real Toyman, Winslow Schott.
In fact, almost all of the many versions of Toyman to appear in comics over the years have been shown to be robotic toys created by Schott.
Toyman also has a relative named Anton Schott, aka the Dollmaker.