Parents need to know that this album is the soundtrack to the popular educational DVD of the same name, a Parent's Choice Silver Medal award winner, and part of a series that was developed with experts from the Yale University Family Television Research Center. Consider buying them as a set -- though the CD works well enough on its own as a backdrop to playtime, they might make more sense together. Almost every track is a variation of the famed song, and Roger Daltrey, the lead singer of The Who, is one the creative forces behind the album.