Recently I discovered some great (new?) books for my preschool age son.  It is the dinosaur series by Jane Yolen and Mark Teague.  The books basically show the kids how to behave in certain situations by letting dinosaurs be the main character. Some of the titles that I've found are "How do Dinosaurs eat their food", "How do Dinosaurs clean their rooms", "How do Dinosaurs play with their friends".  There are also some like "How do Dinosaurs count to ten" and "How do Dinosaurs learn their colors".  My son is fascinated with dinosaurs and the books have great illustrations of what the dinosaurs could look like and actually give the correct name for each of them.  It is so much fun to see the dinosaurs in modern day situations and at the same time teach the kids a little lesson.