This is a fashion project you can build with your 3D printer. And it lights up!
Adafruit’s Learning System describes the relatively straightforward project to make this fashion accessory. It’s a flexible band that can attach to your shoulder, neck or wrist - and it lights up! A tiny micro controller animates the embedded LEDs in different color sequences.
The 3D print must use a flexible filament and Adafruit recommends NinjaFlex, which is the flexible filament they sell for USD$50 per spool.
This project is easy for anyone to do - if you have a 3D printer. Those that don’t won’t be wearing these spikes.
Did we say this lights up? it does!