Difficulty: Easy ★☆☆☆☆
The instructions for building this are the same for the papercraft Farnsworth ornament which can be found here.
Don't follow the step to add the ribbon to hang it (unless you want to). You can still add any picture you like into the monitor circle. Other than that the only difference is the size of the model. The finished life size Farnsworth is approximately 7" tall.
The only additional step you might want to take outside of the original instructions would be to coat the finished model in Mod Podge or resin. I used fiberglass resin for its finish (not too shiny but not matte). The sepia tint of the resin also added a nice effect to the model.