These photos are licensed CC BY-SA 4.0 by Aleph Objects, Inc. 2015 See design licensing and 3D printing information below: * Griffith Observatory scale model (first draft) by ddThingz is licensed under the CC BY-SA license, and was 3D printed in blue n-vent filament on a LulzBot Mini. * Build Your Own Jet Engine by GE is licensed under the CC-BY license, and was 3D printed in blue, yellow, and red n-vent filament on a LulzBot Mini.