I like cards. My only rule around here (ok, I have a lot of rules....) is that I must get a card from Adam and Mike on my birthday, from Mike on our anniversary and v-day and one from Adam on Mother's Day. Other holidays can go by without one, but these things demand a card.
This year for my birthday, Adam was able to actually write letters in my card, and I will cherish this one forever:
The outside of the envelope:

The inside:

Daddy told him what letters he needed to write, but he did the writing all by himself. This was really the best birthday present ever.