I used chocolate fondant and candy clay to cover it so that it would be stiffer than fondant would be. Since it was being picked up by the client it needed to be able to travel, so the sturdier the better.
The base layer was covered with sand-colored buttercream, then with crumbs to look like sand. Candy rocks, fondant shells and chocolate foliage made up the landscaping. The only part that wasn't edible was the top section with the cover over the beacon.
I gave the client a bag of graham cracker crumbs to finish off the board once she got it where it was going.