Gyroscopic keyring with flowers

This keychain is composed by four indipendent rings, rotating freely one inside the other as in a gyroscope. They cannot be separated.
The rings are printed all together and without support.
I scaled down the model by a 0.75 factor.
You can see other gyroscopic keychain at mine :
"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 Thingummies”, at http://www.thingiverse.com/thing:879393
“gyroscopic keyring 2”, at http://www.thingiverse.com/thing:644217