We used vanilla cake for the sand and spice cake for the dirt. NOTE: Spice cake not good for "building" Next time I would use brownies. Blue jello for the water, M&M's for flowers, and obviously green icing.
The creeper, pig and tree were made from flat craft foam sheets. I used a hole punch to make a quadrillian holes for the tree. It took forever and now I have a baggie full of green foam dots for something later.
Thanks for looking.