We had a similar bike to the first photo, back was used to strap on our school bags or lifting a friend, never had the high middle bar, lower for girls bike !LOLZ
Brothers taught me to ride, fall, get up and go again amidst hoots of laughter at around five years old, maybe slightly younger.
Bicycles were our mode of transport to school, visiting friends, going on weekend expeditions cycling further afield to explore the koppies and veld, lots of fun back then. !LUV the freedom we enjoyed!