I used a lot of these type of books when my boys were little. They're also really nice for taking on long car trips - they keep the kiddos busy, and might just learn a little something in the process. Graveyard Mall has a set of 6 Crayola Dry Erase Learning Books for just $12.99. Shipping is a flat $2.99. So you'll pay $2.66 per book SHIPPED.