Also, NY Times and Bronx Beat articles on the project. My compilation of safe boatbuilding materials for kids .
Young children hammer most effectively on the floor.
Boatbuilding strategies that take advantage of this are easier. For example, in Wacky Lassie we preassemble chine logs to sides, and keel to bottom, flat and on the floor. Then we bend around the molds. Nailing sideways, on the less solid molds, is harder for kids. Teams of 2 to 4 are very effective.