Educational and fun. Kids use their creative ability to design an endless variety of boats using only 8 pieces which you cut from three quarter in. stock. All pieces are assembled with pins – quarter inch dowels – and are held in place by the smokestacks – seven eighths in. dowels. Boats can be pushed or pulled without coming apart. Plan includes FULL SIZE drawings for all pieces, including the storage box. Box measures 19.5 x 11 x 1.5. An illustration sheet can be glued to the box lid showing how to assemble 18 different boats including a tug boat, a freighter, an oil tanker, a luxury liner, a ferry, and various naval ships.