copying dvd's

Just to clarify off the bat, I am not trying in anyway to rip off DVD's. I have a 1 year old son and a 2 year old daughter, both of which love to get into CD's and DVD's and have a tendency of ruining them. I can copy the CD's just fine, but have not been able copy DVD's. All I want to do is make a copy/backup so if they ruin one I can just make a new copy of it. They are all right protected these days and I have not found a program yet that works. Any advice would be appreciated, It gets kinda expensive everytime they get into them and I have to buy another one. Thanks

Alcohol (http://www.alcohol-soft.com/)

why is it named that?

Beats me but it works pretty dame sweet get it for free on any torrent/P2P.