MicroRover
From Hack Manhattan Wiki
Nano-powered Micro Rover
Originally designed by Rick Winscot for the Trinket, we've modified the rover to use a 5V Arduino Nano instead, and simplified the build by sourcing some cheaper continuous rotation servo motors, so now you don't have to modify them yourself.
This kit is ideal for someone who wants a project to build and extend at the space over a few evenings.
A limited number of kits are available with all parts except the 3D printed parts included. See Dave if you'd like to buy a kit.
You are encouraged to 3D print the parts for yourself, or better yet, redesign and improve them!
Source Files with modified instructions
https://github.com/Xendi/TrinketRover
Original Build Instructions
https://learn.adafruit.com/trinket-powered-rover/red-rover