I have a lone coturnix quail that is about 5 weeks old.  We have kept her in the house in a plastic storage bin brooder.  She also has a bird mirror and three stuffed animals.  The kids play with her all the time, so she looks forward to that.  That and the June bugs they have been bringing in for her to chase around!
Now I have so far one lone silkie chick also.  I am really dissapointed in that hatch.  I am fearing that it will be the only one also since most of the eggs were duds.  I guess she will have to be raised in the brooder the quail is in since it is about to get an outside cage.  Maybe she will just be more of a pet than our other chickens.