The Black Pearl is somewhat better than Davey Crockets pontoon 

Trevor and Chris

     Our boat was a box shape with a stryofoam bowl and two halves of a ziplock bag on the bottom. We used,  a ziplock bag, 1 sheet of 9 x 12 Cardstock, 120 cm of Duct Tape and 30 x 45 cm Aluminum Foil. We Used the cardstock as the body of the boat and the foil around the entire boat to waterproof it. The Duct Tape was used to hold everything together.