I am making a cake for my husband's school auction and I want it to spin slowly. The problem is it will be pretty heavy...I think it'll be 18" high with 9" tiers slightly carved into a dress shape. So, it'll be like 4 cakes put together! I don't even know where to begin with the mechanics of it. Where should I go to get the parts and pieces????? HELP!

Your going to need a heavy-duty cake board underneath which will be a motor that turns the cake. As for what kind of motor and how to hook it up, I have no idea.

Check your local restaurant supply, you may be able to rent something.

I am not sure what they are called, but my father had one that he used to display a rotating turkey that was decorated for a buffet table.

it was made out of aluminum and came with different weighted bases (square, round etc)

If all else fails you may want to consider using a pottery wheel as clay can be quite heavy so it should support the weight of the cake.

HTH

Rotisserie!!