If you are mathematics geek, love advanced geometry, four dimensional space, fractals, knots and art you will enjoy this presentation. One hour worth watching of Henry Segerman from Oklahoma State University giving presentation on design of 3D printed mathematical art during Symposium on Computational Geometry 2014.
The presentation in PDF format can be found here:
https://www.math.okstate.edu/~segerman/talks/design_of_3d_printed_math_art.pdf
The presentation in PDF format can be found here:
https://www.math.okstate.edu/~segerman/talks/design_of_3d_printed_math_art.pdf
You can see Henrys four dimensional puzzles in action here: