They say that when you forget something at someone's house, that means you want to go back again. So the good thing about grandchildren forgetting things when they come to visit means that you know they'll be back. The bad thing, though, is when they forget something important for school or after-school activities that they need the next day -- and they live too far away to come back for it. What do you do?
What we did, at my daughter Nancy's suggestion, when Nina forgot her piano lesson book, was this: I scanned the two pages she would need into my computer and then I emailed the pages as attachments to Nancy. She got it within minutes, Nina was able to practice, and I gained a new appreciation for the confluence of technology and grandparenting.