Today I got to spend a little time in my son's class at school. He's in an Extended Day Kindergarten class to help bolster up some skills, before going on to 1st grade. His teacher had me spend a little time with the kids playing this:
It's a card game where you pull out two cards, and the kids try to find a matching letter or shape, one on each card. There are six shapes/letters on each card, and you're guaranteed to find a matching combo out of any card in the set. The teacher has them slap the table when they find it, and if they guess it, they keep the cards. The one with the most cards at the end wins!
I had so much fun playing this with the kids, that we didn't want to quit! I came home and looked it up on Amazon right away. Highly recommend! I could see the whole family having some fun with this.