Haunted Castle is a fun symbol matching card game good for 4-6 year olds. There are no words, only fun pictures of ghosts, witches, black cats, pumpkins, etc. The object of the game is to figure out which symbol is missing from each card. You turn the cards over one-by-one and everyone gets to shout out which character they think is missing. If you guess right, you get to keep the card. When you run out of cards, the person with the most wins. It's a nice game that's interactive, a little bit competitive in a good way, and teaches memory skills (or whatever the opposite of memorization is since you have to figure out what's not there).
At first, I had to make sure not to guess correctly too much but now I have to really fight to stay in the game. :)