Linus the Lionhearted is an American animated television series featuring a main character of the same name. The character was created in 1959, by the Ed Graham advertising agency, originally as a series of ads for General Foods' Post Cereals. At first, Linus was the spokesman for the short-lived Post cereal "Heart of Oats" (a Cheerios imitation). Eventually, the lion was redesigned and reintroduced in 1963, to sell Crispy Critters, which featured Linus on the box. The ads were so popular that a television series was created in 1964 (with General Foods as sponsor), and ran on the CBS network until 1966, then reruns [in color] aired on ABC from 1966, until it was cancelled three years later. A coloring book was published which detailed the adventures of So-Hi going on a scavenger hunt in or