Although most of the examples on this site show the Bootstrap robot with 3D printed components, access to a 3D printer is not required to build Bootstrap. By using a few extra purchased components and a little fabrication from scrap materials a fully functioning Bootstrap can be built without one. In fact the robot was designed around these widely available parts and materials and then 3D components were designed to mimic what could be purchased or hand cut.
Details of how to build Bootstrap without using 3D printed parts are provided on the Variations and Upgrades page. That page also includes downloadable templates for hand cutting the chassis or using a CNC machine or laser cutter to produce it. The extra components required are specified at the bottom of the Materials page. The example shown above (a mock-up with incomplete wiring) uses 6mm plywood for the chassis and aluminum flashing for the bumper. It also has the power switch mounted on the left side, rather than the right, compared to the 3D printed version.