In Tugboats, beginning readers will learn about the parts of a tugboat that allow it to move boats and freighters of much greater size. Vibrant, full-color photos and carefully leveled text engage emergent readers as they discover the unique features of these machines.
![Tugboats (bullfrog Books Machines At Work) [Library Binding]](/itemImage/2/9/2/9/2_473493.jpg "Tugboats (bullfrog Books Machines At Work) [Library Binding] xxx")