On Allan's first train ride, every twist and turn brings a new sound.
Clickety-clack!
The train goes over a bridge.
Clang! Clang!
It nears a crossing.
Whoosh!
The doors slide open at a station. But Allan's favorite soundâ
Whoo! Whoo!
âdoesn't come until the very last stop, when he gets the best surprise of all.
