A trick I found with my little cousin was to pretend to think about it for a minute. I’d say "ummm … " and furrow my brow and be quiet for a few seconds. It creates this little moment of suspense which makes the answer seem more desirable to her.

Gotta use that lossless format so you can pick up all the sound artefacts caused by an imperfect physical format.

See the problem there is that Plex is transcoding instead of just supporting popular audio formats directly.