Sorry I wasn't clear, I had meant clever in the same way you had outlined.
To explain my epaper comment, I've seen several small keyrings and phonecase-type epaper screens start appearing. You could combine a small lenticular screen with one of these to have an updatable animated image. A pure novelty for kids/big kids - a complete waste of resources for nonsense though...
- you could use an e-paper display without the stepper motors - you could use an o-led display and be able to read it in the dark - etc