Password protection for Apps

There is no way to do that.

the iPad is meant to be a single user device, so it has no options for locking out certain apps or parts of it. The closest you can come is with the restrictions (such as you can lock out youtube or making purchases etc.

There is no way to password protect apps with any feature of the iOS. Your best bet is to place the apps in a folder in a far off screen and try to hide them. There may apps that let you create locked folders - but I have never seen one if they do exist.

You can let them know you'd like a feature like this

http://www.apple.com/feedback/

No guarantee that you'll ever get a response. However, from reading this forum, the control that you're looking for is something a lot are wanting. Whether or not apple will respond is unknown, but the worst that'll happen is that you 'waste' a few minutes sending an e-mail that never gets an answer beyond a form mail.