Last night I had to teach a class and the creche wasn't open. But it's behind reception which had three people on it last night so the girls said to put them in the room and they would keep an eye on them.
Soooo... the girls didn't see fit to say anything when they were "keeping an eye" out? Great eye there. I'd be cross with the girls on reception! Your son wouldn't have been near the bouncer if they'd spotted and said something.