So I'm sure to start some debate with this. But I just don't drive my car anymore. We're almost a 1 car family and I like it, except that I have another car that I use occasionally and it costs money just sitting there.
I'd rather have my bike back .. like it used to be. But I think I'm still a bit away from this.
I'm not a fan of seeing wee ones on bikes, it scares the crap out of me. And really it just got me thinking about how old I would consider it to be OK for my eldest to be on a bike.
To get the ball rolling, I'd say a responsible 10 year old should be OK so long as they aren't tiny for their age.
An average 10 year old, I'd imagine would be 4'6" ~ 80-90lbs. (give or take for gender).