Convection rack illy

Penny-Holding Boat Challenge? - penny boat help

I have my school engineering class, we need a boat that is small enough to fit into our cupped hands and float in a bucket with 5 gallons of water design. The materials may not be the foil, toothpicks and glue in the world. Take the boat must be able to sink as many coins as possible without, which is defined as follows when the boat started on the water (not if) it falls below the waterline. The top of the vessel must be opened to allow currencies to be added, and the ship can not be so high that it exceeds the top of the cube, and you can not touch bottom.

So far, I have a 5 "x3" x3 "picture frame van toothpicks around the edges and across the center of each page (except the tip, which is open for cents). Everything will be enclosed and sealed with superglue. Is this the best boat design? Any idea how this could affect the structure or form to make it into several parts?