I made this for my 23rd Birthday party, my sister threw me a Luau. I of course, demanded to make my own cake. The "sand" is Nilla wafers ground up. The "seaweed" is fruit roll ups cut to shape. The lounge chair and the trees are candy melts and pretzels. The only thing not edible on the cake is the gems in the treasure chest, I didn't have the resources to do the poured sugar gems.