I think it's sad how much things have changed and what a scary place the world is now.
My brother and I used to walk to school by ourselves younger than that. At around the same age we were allowed to play out at the park up the road without parents and so were the other kids in the area. We were allowed to walk to friends houses and the petrol station. A little older when I was around 10 and my brother was 8 we had to catch 2 different buses to get to school (not school buses).
At around 13 for a few hours between when mum left for work and stepdad got home from work I'd watch my infant sister. Change nappies etc.
As I got older I had to do more and more. And today I'm happy I was able to have such independence and freedom so young without fear of being snatched or hurt.