Q: How do you run a continuous slide show in kiosk without viewers changing anything or using ipad for something else?

Easy. Put it behind a sheet of glass. I'll bet you would prefer a highly technical answer, but there you go. 

Hi Michele -

The easiest way to set this type of slideshow up is to pair an app designed for this type of use case with Apple's Guided Access.

As full disclosure, I work for a company that makes Kiosk Pro, a kiosk app for iOS - http://www.kioskproapp.com.  Our Plus and Enterprise versions include a screensaver feature that allows you display a series of images and/or video files stored locally in a folder on the device and includes settings to disable touch so you can use the app as a digital sign.  There are other apps out there that do this as well that you should be able to find in a Google search.

We do recommend using Apple's Guided Access feature to 'lock' the device to a single app. You can find information about setting up Guided Access here: Use Guided Access with iPhone, iPad, and iPod touch - Apple Support

Good luck with your project - if you have further questions, you can always contact us at our support email: support@kioskproapp.com

- Becca

I would use an iPad to HDMI AV cable adapter and connect the iPad to a stand alone monitor or TV and then place the iPad under the counter in a safe place.

Cable is available in the Apple Store or most any supplier.

http://store.apple.com/us/product/MD098AM/A/apple-digital-av-adapter?fnode=3a