Transformers Optimus Prime Helmet cake based on the voice changer helmet toy. This is all cake with an 8" square tier and a 6" double barrel (7.5" tall) sitting on top, detailed to look like the helmet. I did not carve the top tier...all the details and depth was added on by layering on panels of fondant. All covered and detailed in homemade marshmallow fondant. You can see the post on my FB page for more details in how I added the detailing.
TFL - Violet =D