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.Thomas the Tank Engine It Is Great, was published 2003 under ISBN 9780785399506 and ISBN 078539950X.