I live in New Zealand. I went to an exhibition on Saturday. The law requires up to 8 year old to be in children car seats, but it is recommended that children car seats should be used up to the time when the child has grown to 148cm or about 11-12 years old. Sitting at the front is not recommended because the travelling speed of airbags is about 200km per hour. The impact will actually kill the children rather than protect them.