Power Sphere

So here are some rough sketches of my first robot. I'm going to order the parts today, all of which are in the start here robot:) But I'm going to change it up a bit and see if i can put a few bumper sensors in. It's going to be a silver sphere, that I'm going to cut into three, I will use the outside pieces as wheels and then i will put two very small wheels perpendicular to those on the bottom of the middle section, all of the wires and motors and power supply will go inside of it, so it should be very clean looking from the outside:)