Here for a field trip with my son and his classmat...

Here for a field trip with my son and his classmates (kindergarten). Got before the opening time at 10am. Yoi need to change the policy or train your guard at the entrance. How come only 5 at a time can go inside the bathroom before opening time?! We were with kids who obviously will have a hard time holding their bladder and will most likely have an 'accident'.