"Calvin and Hobbes | Every Day Fun
By Dan Robertson Published November 9, 2012 at 17:32
"Mr Watterson never marketed for merchandising. All product’s outside of the books, two calendars, and a textbook titled Teaching with Calvin and Hobbes are all counterfeit works. This includes those pictures depicting Calvin peeing on things. In 2010 the US Postal services released a set of postage stamps honoring Calvin and Hobbes as one of five comic strips that year."