Huff and Puff have too much stuff!

the long version

Huff the engine and Puff the caboose can move a train together, but when they cannot move the train because they have too much stuff, they discover that friendship is all they need. "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.