You've gotten alot of great advice here. I'll put my 2 cents in and leave it at that.

Kittens are high energy pets. They are young and spunky. I know because I have a 9 week old kitten in my spare bedroom who thinks I'm her "human playscape". She's going up for adoption on Saturday (I was just fostering her till she was old enough).

There are a couple of options. Keep the kitten and get her a playmate so she won't be bored or ask the shelter to let you switch her with an older cat (a teenager perhaps, one who has already been spayed/neutered and has calmed down). I wouldn't worry about bringing the kitten back because kittens are easily placed (EVERYONE wants a kitten). You can also "kitten-proof" your place till she grows out of that stage, which she will eventually.

OR...you can try and work with her. Keeping her in a small enclosed space in an effort to try and introduce her to your other pets can get a bit tedious. Go into the bathroom and sit on the floor with her. Read, give her treats, pet her, talk to her. She needs human contact, not just being kept in a room till it's okay to let her out.

Let us know what you decide.