I have found a design for a rubber band powered hovercraft that I am
interested in building with my Scouts. However, the design is from the
UK (http://www.1stmerrickville.ca/events...raft/index.htm) and it
calls for a polystyrene ceiling tile. Googling around doesn't seem to
show any North American sources. The local Home Depot just has
fibrebased ceiling tiles. But they are heavier than a polystyrene one
would be.

Has anybody seen any tiles like this around?


Thanks,

Allan.
http://www.1stmerrickville.ca