I did a cheat version last year, I made a round sponge and topped with yellow icing around the edge and green in the middle. I made a path with pebbles. Stuck in some lego trees, Made a little red x with tiny licorice straps. Had two lego pirates lugging one of the lego treasure chests on the path and one had a spade in his other hand. I put the whole thing into a square dish I had which I filled with blue jelly and set lego sharks and small pirate ship into. Was much loved.