The camera is not the interesting part. The cartridge is the cool thing, and the camera was designed and built solely as the means to show it off from a very restricted frame of reference.

In order to maximize the effect, the cartridge should be programmed to "develop" the initial image with a visual effect from a black screen, and then hold there for a few seconds. And then, when the person you're showing off to starts to think "Ah, this is just a digital version of a Polaroid photo--that's not so impressive," that is when you start looping the animation.

You have to give the person a chance to make an assumption before you break it.