Caillou learns about patience when he goes fishing with Daddy and Grandpa at the pier. But learning about patience is hard; can Caillou wait long enough to catch his own fish? When Caillou sees a flyer in the mail about a fun looking water park, he wants to go. But Mom says it's not a good day for it and Caillou is disappointed. That is until they come up with an idea to make their very own water park in the backyard! Grandma is watching Caillou for the day, and he wants her to play trucks with him. But Grandma has a better idea; why not help do the laundry? She makes such a great game of it, Caillou wants to play it again and again. Caillou learns about helping out, and that it can be fun too! Caillou gets an introduction to what it means to be handicapped, when, at the pool, he meets Tammy, a girl a few years older, who happens to be in a wheelchair. It's raining outside but there is no stopping Caillou! Since no one wants to join him, he goes outside to play in his new froggie boots, his rain coat and hat. He has a great time walking through water, playing in the wet sand box, and making mud soup.