Mindstorms Cake Cutting Robot

[youtube https://www.youtube.com/watch?v=1YUn9tpwR9U?hl=en&start=0&fs=1&rel=0&showinfo=0&ap=%2526fmt%3D18&w=600&h=493]

This creation, by Bart and Stef, repurposes a can lid to cut cakes. You can select as many slices as you want and the NXT brick computes the angles.