This playful board book introduces young children to the world of trains in their many forms. There are fast trains, steam-powered trains, electric trains, freight trains, and so many more! From the author and illustrator of Go, Bikes, Go!, this delightful board book celebrates train culture in all its forms--fast, slow, high, and low! Whatever form they take, they're always on the go. There are a huge variety of trains in the vibrant and playful illustrations showing diverse families enjoying everything from the slow but steady streetcar to the bullet train speeding in a tunnel underwater.