Art Puzzles

I've created some fun art puzzles, with works from Warhol, O'Keeffe, Parrish and more, to integrate into an art unit. Here's the link, if it may perhaps be useful to you as well:

http://zachary-jones.com/english/art-puzzles/

They are lots of fun and, from a pedagogical standpoint, encourage learning by engaging spatial and visual intelligences through the use of authentic art. I've started with a selection of American art, but I'm interested in hearing of some other artists and works you'd like me to include. Thanks!