What is the age the kid can sign in/out without a parent? Are the lab and club connected? How do the kids go from one to another? Is the check-in at the same place? We cruised last year but my son went to the kids club for only about an hour on the last night for friendship rocks. He will be 7 on our cruise and I do not want him to be able to leave without me but I do want him to be able to go back and forth between the lab and club. So confused!!!