Boat building courses, skin boats, canoes, kayaks, rowboats, boat building plans, instructions, kits, materials, classes. everything you need to build your. Yost-style skin-on-frame free kayak plans. siskiwit bay skin-on-frame sea kayak plans. for builders desiring a skin-on-frame version of the boat built in. Stimson marine offers a bow roof shed design, numerous boat plans and kits, including skin-on-frame designs, and boat building lumber..