Place cake on stand and set miniature toy dump truck on top.
Fill the dump truck with the crumbled Snickers and allow some of the pieces to cascade down the side and along the edge of the stand. Lightly push them into the cake to affix.
Place cone candles between the fallen pieces of candy at the base of the cake, and set cake stand on Styrofoam riser wrapped in faux grass.
To make the cake garland, wrap the ribbon around the side of the cake while gently pressing it into the frosting. Cut the end off of any extra length and use the remainder to wrap around the foot of the cake stand. Remove the ribbon before cutting cake.