There are a few commercial kits on the market that allow printing onto a spherical or egg-shaped device, and with those in mind Instructables user "experiencingphysics" has created his own version using 3D-printer parts, some stepper motors, external motor control boards and an Arduino. Furthermore they've detailed the hardware construction very well, so making the frame and general enclosure shouldn't be too difficult at all. It really does work well, as shown in the following video:
That's awesome, and if you have access to a 3D printer the cost can be much less than comparable kits. Visit the Instructable to find out more. And for more, we're on twitter and Google+, so follow us for news and product updates as well.
If you're new to Arduino and want to join the fun, the first step is a solid board for your projects - our Freetronics Eleven - the Arduino-Uno compatible with low-profile USB socket, onboard prototyping space and easy to view LEDs: