All of the above, seems to me. When I was 9 my baby brother was about 8 months old. It was summer. I got him up, changed him, fed him, put him in a giganto old baby carriage and walked him to "town". I did this almost every weekday in the summer. No one thought this was odd and no one called child protection, and, nothing bad ever happened to us. Where was my mother? Sleeping in of course!