Tired of being last on the smoky, noisy freight train, Katy Caboose wishes for some way to escape from the endless track

"Huff pulls the train. Puff pushes the train. Together they can haul a lot. Big stuff, small stuff, they've got it all! But what happens when the best friends realize that they're stuck with too much stuff? Farmer Fluff has just the solution! Simple rhyme and easy-to-read verse will help beginning readers and train lovers build their vocabulary and strengthen reading skills."--Book jacket.

Traveling along the rails with his engine buddy, Huff, a little caboose named Puff clicks and clacks endlessly until the day that the friends decide to switch places, with unexpected results.