caption: This was the second annual regatta, in which folks design and build their own boats using cardboard and duct tape. The boats can hold only two people, and can be up to eight feet in length. There were eight entries this year, and the top two teams from each of the two heats competed in the final race at Hopkins Pool. <PERSON>, aquatics supervisor at the park district, said that the event was such a success last year that she wanted to bring it back. She said several people who participated last year returned. ``A lot of people showed interest in doing it again,'' she said. ``This gives people a chance to be creative and do something they don't normally get to do in the pool. It's open to all ages, so we get a good mix of people. It builds teamwork, and is just a lot of fun.''