You can get a completely waterproof bag, anything from phone sized to a backpack (probably comparatively expensive). Obviously the smaller the better if you’re surfing too. A lanyard for the key (unless it’s a modern car key) and a bit of money tucked into a phone case?
Haven’t taken my baby anywhere yet, but I’ve been diving and been around Europe a bit on my own 🙂
I did surfing lessons in portugal but got driven to the beach so brought nothing. You going somewhere nice?