I never sent cards to my estD, right from the start, but I always did for the GC, and the same card put in their gift sacks, same words/little letter too. This Xmas I thought I had giant cards, that I had bought a few years back, with smaller ones, they just caught my eye in the card shop, the one for my GS was a big pirate ship pop-out, he loved pirates at the time & the one for my GD was the same sort of pop-out card, very sweet! Anyway when I got them out of the cupboard, after Xmas week, they turned out to be Birthday cards
It was too late to go and buy more, so I just put on the cards "silly ole nannie..." and explained.
You see I find it hard to go into the card shop at Xmas to buy the GC cards, all the other GM, with a glim in their eye cooing over what lovely cards to buy for their GC, chatting to me next to them, me with a tear in mine, trying to bit my lip and get out quick before I start crying. I have to really brace myself to go in and buy and must say, I'm wondering if I can do it again! With no add now they've moved, I can't even put a stamp on and post them, just write them out, walk into the spare room and put them in their gift sacks, soul destroying 
As you may remember, I always put an advert in our local paper with a 'happy birthday' message for them, this is the only small connection I feel I have left. But this year I am not sure if I will, so many years now, they live in a different area, but still only 20mins away. I just hope that the trolls who laid into me last year for doing this, haven't influence me. My message in the local was along with other happy birthday messages to other GC from their GP, but difference being, they weren't 'cut out' so they are allowed without comment, but I, being 'cut out', are not 