Pee Wees on Parade

What's the Fourth of July without a good old-fashioned parade down Main Street? The Pee Wees will get to ride real, live ponies down the street! Uh-oh. Molly can't remember ever meeting a real horse. She's seen pictures of them. She knows they are big. Very big. With big feet. She's the only one who doesn't know how to ride. Can you put training wheels on a horse?