PS3 Parental Controls:

With the PS3, you can leave your kids to enjoy their favourite entertainment – without worrying what they'll be getting up to!

With Parental Control options, you can restrict the type of games and movies your kids play or watch. For added protection, the PS3's in built browser can also be disabled with password protection.

The Parental Control setting can only be changed with the system password. Just make sure you keep the password safe from the kids.