Dutch “Bicycle Buses”

The netherlands has a bike lane system so extensive that you can cycle from one side of the country to the other on a bike only lane system, complete with bicycle only traffic lights, traffic signs, road markings etc

You can't have the Bicycle Bus without a commitment to developing extensive infrastructure which did not happen overnight

Apparently this is the manufacturer: https://www.metaalspecials.nl/

Firstly, how do you think this picks up kids at home? It’s so heavy that you need it to be (almost) fully occupied to ride it.

Secondly, let’s say after school time, 3 kids want to play together at one of their homes. How do the two other ones get home for dinner?

In both cases, the answer probably is “on their own bicycles!”, but for the first example, why wouldn’t they continue cycling to school on those bicycles? For the second, how do their bicycles get at their friend’s home, so that they can ride home?