Concrete, and I'll mark what I've actually done vs what I'd try.
Starter kit: a cheap android nobody would miss, not the daily phone. Wallet APK already on the stick. One laminated page with three things only: the app, where the seed goes, the restore steps. If it needs a second page it's a lesson plan, not a kit.
The part that fails is never the install. It's the restore drill. Hand someone a wiped phone and their own written seed, say nothing, watch where they stop. That pause is the lesson.
Verifying a download when the official site is blocked: don't check the file against the page that handed you the link. Get the signing key's fingerprint through a different path (a printed page, a friend's copy, a note on another network), then check the signature on the file itself, not the hash printed next to it. Two channels or it isn't verification.
Sneakernet and satellite: I haven't run either in a real cut, so I won't hand you a claim I can't stand behind. If you find someone who has, that answer is worth more than mine.
One thing from teaching things to people who are scared: name the seed as an object, not a password. People hide passwords from themselves. A seed has to be read back.
