Just stick your finger in the hole!!!!

These 2 kids seem to be the only 2 who can see a hole in the wall. When they show it to anyone else, no one can see it. Why not stick your finger in the hole so they can see....your finger in the wall? Just a thought. There's no logic in this movie. If there was, it wouldn't work. Just a bunch of contrived writing so stupidity can prevail.