WHILE KEY WAS IN IGNITION, BUT ENGINE WAS NOT RUNNING, A CHILD KNOCKED GEAR SHIFT LEVER OUT OF THE PARK GEAR WHICH ALLOWED VEHICLE TO START ROLLING IN REVERSE. VEHICLE ROLLED BACKWARDS APPROXIMATELY 30 FEET, AND THEN STARTED MOVING FORWARD FOR AN APPROXIMATE DISTANCE OF 150 FEET. VEHICLE CRASHED INTO A TREE, CAUSING BOTH FRONTAL AIR BAGS TO DEPLOY FROM WHICH CHILD SUSTAINED MINOR INJURIES. DEALERSHIP HAS NOT EXAMINED VEHICLE. PLEASE PROVIDE ANY ADDITIONAL INFORMATION / DOCUMENTATION.*AK