gyroscopic keyring

let's put together an useful keyring and an amusing gyroscope.

have a look at other gyro keychains at
"supergyroscopic relaxing keyring - 8 rings", at http://www.thingiverse.com/thing:2067014
“gyroscopic relaxing keyring – 6 rings”, at http://www.thingiverse.com/thing:1307100
“gyroscopic keyring 11”, at http://www.thingiverse.com/thing:1225044
“gyroscopic keyring with flower 2”, at http://www.thingiverse.com/thing:1149171
“gyroscopic keyring with flower ”, at http://www.thingiverse.com/thing:1091961
“gyroscopic keyring with Thingummies”, at http://www.thingiverse.com/thing:879393
“gyroscopic keyring 2”, at http://www.thingiverse.com/thing:644217