Abstract: A plastic boat is formed of wide extruded polyethylene foam planks all external surfaces of which have a skin. Two such planks are heated and then folded 60°, such that the longitudinal halves are at a 120° included angle. While still hot, with one half assigned as the bottom and placed on a flat surface, the folded ends are forced inwardly and the plank allowed to cool. A vertical cut is made through two of the planks thus formed, each of which becomes a hull half. The exposed edges are heated to a molten state and the halves aligned and bonded together to form a completed hull. The top edges are trimmed to a desired angle and rounded. A pair of stabilizers and a pair of handles are cut from edges of planks, such that they have skin on their tops, bottoms and one edge and with a smooth curve at each end on their unskinned edges.