Well when I was that age I used to love the "short versions" of the famous Disney tales: Little Mermaid, Lion King, Cinderella, Beauty and the Beast and so on. There used to be a small box with those books in a single collection. Either those or similar versions that pretty much tell the same story. When I gave classes to kids that age they used to love them as well as they love the pictures and do not really care about the story. They can either read them or have us help them read the stories. It is a nice way to bond with your kids, through reading I mean. I am sure you will be able to find this kind of book on the web for sale.