Build a cool bottle catamaran with this awesome science project by 4M. Bottle Catamaran Green Science Kit allows young scientists not only to construct the mechanics project, but to save some plastic and help our planet. Re-use 2 plastic drink bottles as floats for the moving catamaran instead of throwing them away. Follow the instructions from this kids science kit and your bottle catamaran will skim across the water on its pop-bottle floats, powered by the spinning propeller. The Bottle Catamaran Green Science Kit comes with 2 float supports, a crossbeam, 2 plastic straps,a battery case with cover, stich and wires, a top cover, a motor with wires, 2 terminal caps, a propeller and screws. The bottle catamaran making kit from Educational Toys Planet requires 2 AAA batteries, small cross-head screwdriver, and 2 cleaned plastic bottles. The assembled catamaran is approximately 10 x 9.25 inches.