So for our project in school we are supposed to make a model of the three layers of skin, example.. http://www.glomedspa.com/epidermis-cake-skin.html   I thought this looked really cool.. But I was wondering if anyone had any other ideas to add.. to make a little more unique and creative?.  I was thinking of stacking cakes, like three layers, make going diagonal but I don't know how?  Or if anyone possibly knows how to make a head??.  Thanks for any input/...