In And to Think That I Saw it on Mulberry Street, every simple thing transforms into something else in Marco's hands. A horse becomes a reindeer becomes an elephant becomes a giraffe… and you get the idea. His imagination just goes on and on, because he's not willing to settle for the easiest thing. He wants the most fantastical and amazing experience possible, and he's going to make it happen, even if it's only in his own mind.
Questions and Answers
Q: Why doesn't Marco just let things stay as what they are?
A: Marco's mind can make things so much more exciting, so why would he just let things stay as they are?
Q: What's the craziest thing that a horse and wagon could turn into?
A: A dinosaur pulling Cinderella's carriage. An ant pulling a matchbox holding the queen of the beetles. A unicorn pulling a house on wheels.
Q: Where does Marco get all his ideas, anyway?
A: Marco's ideas come from his imagination, but they also come from things he's probably seen or heard about in the world.