I did this, but for a Camera app ;p <a href="https://apps.apple.com/us/app/zero-ui-gesture-only-camera/id960929710" rel="nofollow">https://apps.apple.com/us/app/zero-ui-gesture-only-camera/id...</a>
Still available in 2021! <a href="https://www.kuuau.com.au/collections/paper-shoot-camera" rel="nofollow">https://www.kuuau.com.au/collections/paper-shoot-camera</a>
I'm considering this as first digital camera for kids, with custom 3D printed case. But I'm thinking of other alternatives - would a RaspberryPi Zero with pi cam work?