To create a picture that works as a good read aloud story try thinking like a librarian. Story time is coming up--what books are you going to share with your squirmy little patrons? The books you'd choose probably need to be short and attention grabbing because crowd control is part of the job. Want to see inside the mind of a real librarian? Check out this and this because they can give you insight into what works in books for little children. And how you might write one that would be delightful in the hands of a librarian.