Any way to pw protect movies in iTunes??

[JPK]

My new iPad has become a favorite of my kids. They love watching downloaded music videos and kids shows. I wanted to put a few movies on there for the odd time that I would have enough free time to actually watch. Nothing hardcore, but certainly R rated.

Is there any way to password protect them so they cant just pick up the iPad and start watching Goodfellas?

Thanks,
JPK