The human calendar
Once upon a time, I went a-visiting to the website of someone who had left a comment on my blog. (I always try to visit your site if you leave a link to it when you comment). Anyhoo, this particular site was called Hivenn and it turned out the blogger was a sweetheart of a young, blue-haired gal from the UK who took some quite lovely photographs. One of them struck me as particularly moving and I wanted to tell her so, but I couldn't find out where to leave comments.
BUT while I was searching for a comments option, I found this human calendar at the bottom of the page. The little folks inside the boxes will even figure out what day it is on your side of the world and switch places and signs accordingly. Things like this make me embarrassingly happy.