Thomas is a very fast engine, and Percy wants to be fast too-but when Percy pops a valve, will Thomas slow down to help him out? An excellent lesson for children to learn that helping out friends is important. Kids will love reading along with this sturdy board book, and it even poses as a toy train too, with wheels that you can roll along the rails! Board book, 8 x 5″, 12 pages, ages 1 – 4.