“If the parents have a history of suing businesses or something then it may be possible they put the child there.”
I know what you mean, but in this exhibit the parents would have to literally catapult him over into the enclosure if he had not somehow crawled through to fall into the moat.
The viewers stand at eye level with the gorillas, but you are separated by a railing, a cement waist-high wall, feet of dense brush and a fence BEFORE you get to the deep moat that has the flowing water at the bottom which stands between people and the animals.
So how did the kid get in there? Is there any film?