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Toysmith Bottle Catamaran Green Science Bottle Catamaran Kit from Toysmith. Construct a cool catamaran with this unique science project. Watch your catamaran made from a plastic bottle skim across the water, pushed by its spinning propeller.
You use (recycle) empty 1 liter plastic bottles (not included) and the supplies in this kit to build this 10" x 9 1/4" Catamaran... a Green Science project. Requires 2 AAA batteries (not included).