The boy was taken by ambulance to a Grand Rapids hospital. His condition was not immediately known.
Rebecca Williams of Grand Rapids said she was driving her station wagon east on the interstate when she hit an icy patch, slid off the road into the median and hit a snowbank east of the Nunica exit in Polkton Township. There were eight people in the car.
Williams said her grandson must have unbuckled his seat belt before the crash. Somehow, the window in the back of the car was not broken.
At least one other person in the car was injured, but not as seriously as the boy who was ejected.
Police closed both eastbound and westbound lanes of I-96 several times Friday because of numerous crashes and slide-offs in sometimes blizzard-like conditions.