2 daughters, now 19 and 20, with their own bikes.
They had their own dirtbikes at 4 and 5 and were riding pillion with my wife and I at the same age. Full protective gear and strapped to us, due to being so relaxed that they fell asleep.
Took both of them on California coast trips around the age of 12; they loved it.
Both of them have now talked their boyfriends into the pastime and I'm very proud of them.
My own first photograph is of me as a baby in a sidecar with mum and dad (1947) I was always encouraged by them to develop my bike interests as I grew up.
In my view, it's a wonderful way to develop self confidence and a degree of independence in kids.