I put a basket with a potato head and several accessories on E's Montessori shelf, and she thinks it's pretty cool! She needs help putting the pieces in and getting them out, but she loves to try to get them out (and really works her little finger muscles while trying!)...sometimes (often) she resorts to using her mouth :)
Playing with Mr. Potato Head is a great way to learn body parts and colors! And it's fun, of course!