Despite its small size and simple construction ... We see lots of educational robots around these parts, like this nifty little robot arm. Video after the break.

Most brain surgery requires doctors to remove part of the skull to access hard-to-reach areas or tumors. It's invasive, risky ...

Perhaps something even as small as this pocket-sized robotic ... into every detail needed for building the robot as well as documenting all of the parts needed, although you will need access ...