iOS' 'Guided Access' feature allows you to control and limit the use of your device to just one app of your choice. You can enable this feature in the iPad’s general settings to prevent users from switching in and out of other apps or accessing additional features on the iPad.
To lock an iPad into kiosk mode:
Settings > General > Accessibility > Guided Access > On
Set a password - something memorable but not easily guessed.
Press the home button to return to the home screen. Access your chosen app and once it loads, triple-click the home button. After the Guided Access screen appears press Start
Guided Access mode will begin, and your device will be locked down into one app.
To disable touch on certain parts of the screen (e.g. on a webpage to prevent users from typing a new URL into the address bar), access your Guided Access screen again by triple-clicking the home button and entering your password.
Make sure that: Touch Option > On. You will now be able to draw a shape around any part of the screen and adjust the position and size by pulling the corner circles. Press Resume (top right corner). This part of the screen will no longer react to touch.
To end Guided Access and regain full use of the iPad, triple-click the home button again, enter your chosen password and select End (top left corner)
To restrict the use of Home and Volume buttons:
Open your app in the guided access mode
Select Hardware Buttons Options and switch off or on.
Switching these buttons off simply disables the use of them and they will not respond if pressed by your guests.