When the first kid disappeared nobody panicked. Nobody even thought twice about it at first, because it was a ball pit and a ball pit is a place for children to hide.
I, myself, remember always wanting nothing more than to burrow into that glorious vat of plastic spheres and let them muffle the voices of the screaming throng of kids around me. Of course, this all took place when I was 7. I haven’t even been near a ball pit after what happened that day.