I was fearless at that age. I went out exploring and meeting people. We had a retired neighbor I would visit and learn about wood working. It was a small town.
Honestly, I think the vast majority of people are not going to do anything bad to a small child.
I used to do that, too. Mill Valley CA in about 1964. Pleasant memories.
When I was her age, I explored an old multi-level, concrete Wehrmacht bunker alone and returned home with a live ‘pineapple’ grenade. Kids have got to spread their wings.