App that restricts deleting media

[wcihlu]

I have a four year old son who loves playing with my 9900, but the problem is he sometimes gets into my pictures or videos and deletes things. Is there an app requires a password to delete things? I've found apps which sets a password to get into the media folder but I don't need that. I don't mind if he looks at the pictures I just need to prevent him from deleting things. Thanks!