Calvin and Hobbes were two very influential people in Western thought. Though, as they lived a century apart, we at Cracked are not exactly sure why they're lumped together in the same Topic Page. But anyway...
Calvin and Hobbes is a comic strip written and illustrated by Bill Watterson between 1985 and 1995. The strip is widely regarded as one of the best and most intelligently-written comic strips ever made, as it frequently made social commentary on everything ranging from the ills of commercialism to the pretentiousness of the art world.
While many popular comic strips cash in on merchandising opportunities in their heyday, Bill Watterson was staunchly anti-merchandising. Watterson believed in the integritiy of his work, and felt that any attempt to create Calvin and Hobbes merchandise would ultimately betray the spirit of the strip.
Shown above: the yin to Bill Watterson's yang
This means the only Calvin and Hobbes merchandise you will ever see anywhere (other than the treasury books) is illegal bootleg material. The most infamous example of this bootleg merchandise is the "Calvin urinates on [WHAT YOU DISLIKE]" series of vehicle window decals.
On the plus side, these decals just scream "The driver of this vehicle is a moron!", so at least they serve some purpose as a public warning to the masses.