Robot
thingiverse
Opening the MakerBot seems non-functional at this time, so I'll attempt to resolve the issue. Here's a quick sketch I whipped up - hopefully you find it satisfactory.
Download Model from thingiverse
With this file you will be able to print Robot with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Robot.