Ok, All of you crazy cake decorators.
Where in the world do I get the parts
to make a motorized cake?
Motorized in what way? What do you want the cake to do?
I'd guess a hobby shop.
I just want to practice on a variety of moveable parts.
For example: dog wagging tale.
Spinning in circles
Moving forward and backward on a track like a train.
gee interesting topic
Hobby shop. There is where you're likely to find gizmos, gadgets, whirly-gigs and parts to satisfy your crazy ideas.
Replied to your PM, but will state here for others - Radio Shack, Hobby Lobby, or a specialty Hobby store that specializes in model trains and planes. Hope that helps