My daughter now calls me 'VP sir' whenever she wants something. I forgot to take my lanyard off once.
One evening, that's all it took. I walked in still wearing the staff ID, and she read the card out loud, slowly, the way parents do at our gate. Since then every request comes with it. 'VP sir, permission to have ice cream.' 'VP sir, can the bedtime circular be revised.' My partner has started doing it too, which I consider a breach of household protocol.