I guess I can answer in behalf of Norway and Norwegians.
My passport expires next year and I need a new one.

Apparently it costs 450 NoK ($65 US , €51) and have guarantied delivery time of 10 days and is valid for 10 years.

For kids (0 - 16 years) it costs 270 NoK ($40 US, €30) but they are valid for shorter times:
0 - 5 year olds = 2 years.
5 - 10 year olds = 3 years.
10 - 16 year olds = 5 years.

They have however strict rules when it comes to the photo used in the passports and you have to bring it with you to the police station. You might have to take it at a photographer's, and it will add another 100 NoK to the bill ($15 US, €11).