Nels received the Go Away Monster! board game for Christmas. He was already playing Zingo (matching game) almost correctly and this one is simpler.
Nels is 22 months and can play this game but he follows his own rules. He can grab a piece from the bag and match it up to his game board. But then he usually walks away or messes up his board so he can start over. It works. He's still really young for games so I count this as a success. Not a messy game (yay!) and he can play it for more than a couple of minutes.