Product to keep children off of PS3?

Is there some sort of product or device I can get to protect my PS3 from my son?
We’re sitting here, trying to watch a movie, and about 5 or 6 times he’ll pop the dvd out because of that stupid button. He keeps ruining dvds.
He’s only 20 months old, so redirection does not exactly work for him yet. I do keep trying though. I don’t want him to break it. We were smart enough to get a protection plan, thankfully.