This book was better than I thought it would be, although the bar was low. My 4-year-old son picked this out at a book giveaway event. I'm not a big fan of character tie-ins so I tried to discourage him, but he was set on it and, hey, a book is a book. It turns out that he enjoys all the references to nursery rhymes (and adds in the actual rhymes as he reads), and the book has some nice interactive elements.
ETA November 2018: This book never got much play at our house, and I really dislike TV character tie-in books on principle, so I cleared this one off of the shelf and gave it away.