You'll see this kind of arrangement all over Amsterdam and Copenhagen. Hell, even here in the SF Bay area I see (almost daily) a couple of parents on my bike commute route riding home with bicycles with those long racks on the back that can hold 2-3 kids, with a helmet dangling from the rack as they've obviously just completed the school run.

https://i.pinimg.com/originals/91/7c/7a/917c7a6c31acf962cb21...