Hi Marco Polo, actually, I always had been told by CX staff in lounges that kids do not count as 1 guest when you enter the lounge. I never try to bring 12 at the same time though! So lounge access is really not an issue while flying CX. But it does become one when you fly on OneWorld, as the kids to than count as 1 kid= 1 guess....which makes it way more tricky!