Here’s a great article (by way of Shelf Awareness) with quick tips for book shopping for children. 

Let me add one point to the “bring a kid to the bookstore” tip.  If you have an independent store near you, especially one that specializes in kids books, let that be your destination.  You’ll get a more varied and informed selection that you’ll find at your average chain or mega store.

There is nothing as rewarding as finding the right book for a child.  It can inspire, amaze and live longer in their hearts than any toy can.