Share 'question about multiple queue's & profiles'

Hi--pretty new to the forums but not new to Netflix and have been poking around both places trying to get an answer (that even my brain can understand!) about how second Q's work. My kids are clammering for a Q of their own and was wondering if I added them a profile how does the shipping of movies from the Q work? Is there one Q that is considered the priority over the other--would movies from...