A Sentry Turret from the video games Portal and Portal 2. They're shaped like Eggs, and they will kill anything that moves. Now, regarding the design, the guns are optional, and if you want to make a defective turret, you can just leave the white faces off. Enjoy.
How to Print?
1.Click on the papercraft design image.
2.Make sure it has not been resized by your browser (you might need to click the image again).
3.Print using your browser's Print function.