IMHO you're completely thinking about this in the wrong way.

Those are advanced concepts, totally useless to a kid.

Teach the why and the what behind bitcoin. At a high level. Zero jargon. Create packs of cards each with different concept, the simplest. Explained in the simplest possible way.

No kid should ever have to learn eCash, Nostr, Lightning, those will all be abstracted away hopefully. Just the same way we don't need to send emails via a terminal commands.

Take inspiration from The Tuttle Twins.