I think just about every primary school has some sort of after-school care associated with it. There are also some services that pick kids up and take them to another location, like the YMCA or Youthtown. In Auckland the prices I've seen are $14 for the afternoon or $10 for shorter programs. That's per day so it can be quite pricey. There are some subsidies for residents in a certain income bracket, but I have no idea how much that covers. And a lot of parents seem to trade off picking up each other's kids.