I want to echo Smokey and Kirstin....6 weeks really is too young. Momma cats teach manners, give extra nutrients, etc., to kitties. I think you should suggest, encourage, offer to pay room and board, whatever, to keep this kitty with momma as long as you can. It does make a difference.

As to the what makes a cat happy? The same thing that makes a human baby happy. Love, security, respect, discipline, etc. I really encourage you make a safe place for the kitty. Too often, we are so in love with them we forget they need 'down' time, time where they can relax, and de stress.

Good luck!