I'm sorry this is slightly off-topic, but I was hoping this might be a fun brainstorm for some folks who are more construction-minded than I am.
Our church is taking part in a "Trunk-or-Treat", where you decorate your car, and serve candy out of your trunk. We decided to go with a pirate theme for our car, and our trunk is like a big treasure chest. To pull this off, we need a way to construct a mast that we can attach a bed sheet as a sail, and somehow attach it to the car without causing any damage.
The car has a sunroof, if that makes setting it up any easier, but I'm basically looking for ideas on materials and basic construction. Ideally, this would involve relatively cheap materials that we could pick up at Wal-Mart/Home Depot, and fairly simple setup.
Any ideas are greatly appreciated, thanks so much! -J