This is really cool- a working model catamaran you can build out of used plastic bottles! The Propeller Catamaran, from Doyusha's "Eco Craft Series," is an easy-to-assemble model boat that uses two standard plastic bottles as its pontoons. Build the center portion, attach to the bottles, pop some batteries in, and watch this environmentally-friendly boat glide across the water.
The Eco Propeller Catamaran features: