Design a rocket that could be built in place inside one of the four bays of the Vehicle Assembly Building (VAB) at Kennedy Space Center, which is 525 ft (160 m) tall. Utilize additive manufacturing (aka 3D printing) where possible, considering which materials might be able to be used and which ones may have to be brought in already manufactured.
3D print a rocket capable of taking off from Earth and traveling to Mars or the Moon in one stage.
OpenSCAD to generate the rocket design.
Microsoft Excel and LibreOffice Calc for calculations.
'Rocket Propulsion Elements', George P. Sutton, 6th ed., 1992, for the principles of rocket design.