Hard Hacky Sack

This is a Grippy Ball (Kind Of) Which is Really fun for doing the Rocky Catch (watch the movie or ask someone who has if you don't know). It is really fun and if you master the rocky catch you can switch it from one hand to another so It looks like you are bouncing it in the air.
The ball has 8 weird-looking extrusions on every corner. This makes it much easier to catch since you can't 3D Print rubbery filaments too readily.