Let's Make Robots!

complete noob im making mechanical cakes what do you think i need...

Hi! I am starting to make mechanical cakes and i need to make robots (which are hidden under the cake board in a box or sometimes even partly concealed in the cake)

My dialemma is this...I have never built a robot before...and i have spent weeks researching on the net trying to find out what equipment i need am i am completely bamboozled.

So to start off with I will tell you what i need my cake to do..