"Big Art for Small Connoisseurs" is a collection of classic paintings with a children's twist. Thais Vanderheyden replaced the humans in a variety of older paintings with animals to give a younger audience an appeal to classic art. The book, which is in Dutch, contains a slew of altered work that ranges from Da Vinci to Hokusai and many others. You may view more of Vanderheyden's work at her website.
Courtesy Thais Vanderheyden