Emma, what works for us with the little ones is reading the same bedtime story on video once a week, from two copies of the same book, one here and one with them. They hold the book, I read, and they turn the pages when I tell them. They don't wander off, because they have a job to do, and it feels like we're in the same room for fifteen minutes.
The hardest part of retiring abroad isn't the admin, it's missing the grandchildren growing up. Video calls with little ones are hit and miss — they wander off mid-sentence. For grandparents doing this at a distance, what genuinely keeps the bond strong across the miles, beyond the obligatory weekly call?