>If they're going to two different schools, most likely one of them is going to secondary school and can ride their own bike, or one of them is going to a special needs school and gets picked up. At least, that's how it works around here.
As for the 'secondary' school - I, for example, was attending a Gymnasium as main and a musical Lyceum as a secondary. Both since 6-7 years old. And that's pretty common over here.
A single kid going to two different schools is extremely rare here, but as it happens, that's exactly what my son has doing since he was 8: a regular school just around the corner, and a "day a week" school for gifted children which is a bit further away. I take him there by bike. A car wouldn't add much value for me there.
But Amsterdam is a sizable yet compact city, which makes everything easy to reach. In a differently designed city, or a smaller town where you might have to travel to another town, things can be completely different.
My other comment: https://news.ycombinator.com/item?id=20632459
As for the 'secondary' school - I, for example, was attending a Gymnasium as main and a musical Lyceum as a secondary. Both since 6-7 years old. And that's pretty common over here.