Re-cycled boat

Set up our Stand this afternoon, and saw this on the Club next to us. The hulls of the Catamaran are two empty plastic drink bottles. Some scrap plywood, a cheap 2 channel radio and the complete Rig from a Micro Magic.(Available nearly anywhere) How does it sail? Exremely well, it can't sink (Which is more than you can say for a Micro!!) and it doesn't get broken in the car , and costs less than a quarter of a Micro.
It seems the 9 year old son had the idea, and Dad helped with the dodgy bits, hope the idea catches on and a new class will be born !!