LitterBoxHero H.
This is kinda crazy. It's as simple as downloading the app and putting up a photo. The app has It's own photos but you can also choose your own. The phone will need to be touching the case for it to work. Seems like it uses nfc to work. Will work for other phones but they need to be the larger models to fit the case.
The photo loads on the back once selected. You can see it come to life in real time. Once it's there, it will stay even if you remove the phone.
Cool concept. Makes a great gift for the iPhone lover on your list.