In honor of the last days of Summer, I share one of our carton boats catching a wave. (That's my nephew you hear.) There is nothing simpler and more satisfying than building a boat and watching it really float. I especially love the image of the "little boat" next to the big boat. The real world is one giant testing lab. We found that although toilet paper tubes make excellent sails, if they get wet they begin to fall apart. You can always substitute with a piece of plastic jug or bottle for a more "capsize-friendly" craft. Do try this at home.