The boat-making was a really honest representation of prototyping and collegiality. It seemed like every builder was experimenting with different takes on hulls, keels/fins and propellers. Most importantly, kids were freely sharing, mixing and matching their ideas and work. "Can I put my propeller on this boat?" and "Let's see what happens with a smaller fin." Good stuff to hear.
In another very honest representation of prototyping, none of the designs really, well, worked. Boats sputtered and floundered, propellers pulled water in the wrong direction, hot glue construction tore itself apart. We are failing our way towards a more reliable boat, and enjoying the frustration and challenge.