Build your own boat out of a small plank of wood or thick paper. Attach the motor to the boat and place it in the water. Press the button on the top and watch it set sail. Unidirectional 2-bladed propeller and AAA battery included. Waterproof motor, dry after use. Materials: ABS, silicone. Dimensions: width - 1.26" x height - 6.26" x length - 0.71".