Well, during school I just carry it in my hand...
But at home or anywhere else I have this "thing" I hook them to. It's a series of quarter-circle pieces that all connect (it was originally hooked to a keychain) and they all bend and make cool shapes. Well, I unsnap one of the links and then place the Tamagotchi rings are that, that way I can have them all together at once without having to keep winding the rings everytime I want to just get one off.