Salty seadog
Space Cadet...(3rd Class...)
Going to primary school with the front door key on a piece of string around your neck, under your shirt.
Or behind the font door letter box on a string (Latchkey Kids)
Lucky buggers. I had to wait about 45 minutes in the back shed for my mum to finish working the fields back when I was primary school. She would leave a bottle of soda steam pop and a sandwich for me. Got a key at about 10 years old.