It is common for children in Norway to cycle to or from school. There is no age requirement. However, several things should be considered. Does my child know all road safety signs and rules? Is my child responsible enough to follow the traffic rules? Does my child have sufficient cycling experience? How far is the school from the child’s house? Does my child’s bicycle have the proper safety equipment?. Cycle with your child to and from school until you and your child feel confident to cycle alone. Helmets should always be worn. In addition, it is obligatory to cycle with lights when it is dark and to wear reflectors as well.
More information can be found at http://relocation.no/expat-communities/national-information/cycling-in-norway/