I'm not a huge fan of interactive books as the sounds often seem superfluous, if not downright distracting. But, this book is comprised of five short songs with Thomas-related lyrics you can sing to the tunes of "The Wheels on the Bus," "Mary Had a Little Lamb," "She'll Be Coming 'Round the Mountain," "Down by the Station," and the title tune, which I think is a "Thomas" original. Thomas is on every page with whichever friend is the subject of that song. The book is a nice size for a toddler to handle; perfect for the 18+ months age recommendation, although you certainly could use it with a younger child. And, each song plays in its entirety even if your little one presses another button before it's finished.