My son loves this book! He is eighteen months old and loves all vehicles, but this book is teaching him about opposites, big and small, long and short, and also directions up, down, and around. I think he also likes the fact that is has paper pages but is a nice small size for his hands. There is a lot of nice additional learning at the end for when he gets a little older, too. My husband thinks it is annoying and boring, but it is perfect for toddlers and probably preschoolers.