Moon jelly

This thing is usable for very basic and primitve printer level testing.
Afterwards you can give it away as a DIY bouncy ball or vibration damper.
Less waste, cooler planet.
Also added OpenScad files to make customization possible.

Used black rubber like material is NinjaTek Cheetah.
It makes this thing basically indestructible and child safe.

Please drop some comments if more brittle material is choosed.