A method for forming a surfboard is provided. The method comprises adding a polyethylene mixture into a mold having one or more ventilation holes located therein. The polyethylene mixture comprises a blend of a polyethylene material and a foaming agent. The polyethylene material is in a form comprising at least one of a powder form, a pellet form and mixtures thereof. In addition, the method comprises heating the polyethylene mixture in the mold while rotating the mold for a pre-determined period of time and at a predetermined temperature. Further, the method also comprises cooling the mold for a predetermined amount of time, and wherein either a main body of a surfboard or an entire surfboard is then formed.