Aw, adorable.
This is one of those rare book + CDs where the book is great on its own and you don't need the CD to sell it. Additionally delightful: the song is AWESOME! I listened to it once with my son, bouncing along to it the whole time, and then immediately said, "Let's listen to it again!" If you don't love the song, then something's wrong with you.
However, I would have liked if there was a version of the song that tells the listener when to turn the page on the book. There's no way my non-reading 5-year-old could do the book and CD by himself, and my slow-reading 7-year-old would have trouble, too. The song goes pretty fast.