Individualized, Unofficial Books

My son used to LOVE the movie Cars, so I customized an ABC book with all the Cars characters. We still carry it around in the car for fun sometimes, but it has always been so special to him (even though it's just in protective sleeves.) I googled the images of course, since I'm not artistically talented, but since I'm not reproducing it for the masses, I don't think there are copyright issues. 

​What does your child love that you could create a book or family story about? You can be imaginative or very basic & I'm sure your child will love it just the same.