Build your own 3D coordinate frame
Coordinate frames are your friend! Serious engineers use them, the figure is from NASA Technical Memo JSC-09084 “Coordinate systems for the space shuttle program”.
Build your own coordinate frame out of paper
You’ll need scissors and a stapler. Download the PDF file and start folding:
Print your own coordinate frame out of plastic
Two to choose from. One is single color, single print run.
This next one is in 3 parts, and the axes can have different colors.