I have one, got in on this site, let me get you the link.
here it is.....
I use the cake recipe & a straight crisco buttercream (NO BUTTER) (sounds gross, but to the little boy, he loved having a cake decorated)
PLEASE PLEASE PLEASE use parchment paper (spray cake pan with non-stick cooking spray, lay paper, spray paper)
here's the last cake I made for the client
sand is brown sugar (no cookies allowed, etc etc)