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:
Self-propelled catamaran kit
Two PET plastic bottles (500ml-1L) required
Size: 165x240x62mm (6.5x9.4x2.5in)
Power: 2 AAA batteries, sold separately