Children surviving cancer who mark their last day of chemotherapy by ringing a bell at St. Louis Children's Hospital, can also now ring a giant bell on a billboard over Interstate 44.

At St. Louis Children's Hospital, they've taken their end of treatment bell ringing party outside for all to celebrate.

ST. LOUIS (AP) — A giant bell on a billboard in St. Louis will ring every time a child completes chemotherapy at a local hospital.