The tree trunks are Pretzel Rods and the "sand" they are in is brown sugar. I tried making the animal figures, but it was pretty tough, so I found these little figures at Party City for $0.25 each.
The bottom layer is Swiss Chocolate cake with vanilla buttercream icing. The top layer is strawberry cake with vanilla buttercream icing. The filling on both cakes is whipped cream with crushed oreos. I also made marshmallow fondant for the first time and used that on my cake. I am so excited to taste this. Yummy!