I just found another deal at Barnes and Noble online. The books start at $1.78. There are a ton of books under $1.99. Go to clearance and click on your child's age group. They have a lot of books on clearance for cheap, not just kids.
They also are doing b1 toys and games, get one at 50% off. Ends June 28.
Borders is doing 40% off in store with coupon. You should definitely get a borders reward card (for free). I get the best coupons from them in my email. Ends June 28. I love Melissa and Doug, and they have a nice selection. They also have cute Toy Story Legos.