For my robotics program we just started learning how to 3D Model, and honestly its been the most exciting topic for me. We currently use Autodesk Inventor, and I've just been tinkering around with the software. One of the things I made was one of these Kunai. It's not perfect of course, but I think I did pretty well for having only a week experience of 3D Modeling.

Kunai: Jett Kunai

Had to repost because I formatted post wrong.