But if I had kids I wouldn't really let them participate. Even with the police escort, they might lose the group and be on their own in this busy city.
I'm from near Amsterdam myself and there cyclists are the kinds of the road. Here it's very different.
The mayor is very green and she's trying to pedestrianise a lot, but it's limited to a few lane closures and a handful of "superilla" test blocks. I think there is a lot of resistance to it. I really support her efforts but sadly she doesn't seem to be that popular. She also tried to clean up an area near the seafront with seedy nightclubs and casinos but got a lot of flak for that. I often see graffiti blaming her for stuff :(