Nickelodeon was pretty much the defining cartoon network for every 90s kid, and as much as we all loved it, we're willing to bet you might not know these 12 facts about them!
1) Arnold's full name is "Arnold Philip Shortman."
2) Hey Arnold! actually began as a series of claymation shorts.
They aired in-between episodes of Sesame Street and featured characters like Arnold, Helga, and Harold.