When DS4 started reading on his own he enjoyed Dr. Seuss, frog and toad, Mr. Putter and Tabby, Amanda Pig and Oliver, Henry and Mudge, Little Bear. Those are nice because there are series of the books. We would try one and then if he enjoyed we could go back and get lots of the others. He still enjoys some of them from time to time because they are good little stories. Also, although they are a little overdone at times, the "If you give a mouse a cookie" books by Laura Numeroff (pig a pancake, moose a muffin, etc.). Those are all pretty good, cute stories and pictures and fairly easy to read.