You have to be careful. If you go at an off-hour, you may be lucky but when my kids were little and they went into the ball pit, it was a nightmare. Either the larger kids pushed them over or jumped into the balls landing on top of them and I was fearful the entire time. Not to mention the germs all over the balls. Some claim the sterilize them daily, but I'm kinda doubtful of that. Other than that, it's tough when there are not a lot of kids around to celebrate with.