When I received the USPS Philatelic Catalog (Fall 2018 issue), it really made me smile!
The stamps were created by Don Clark of Invisible Creature.
Here are two videos of the dragon stamps (very dramatic and nice music on the video of the official dragons stamp ceremony video).
Here are two images of the gorgeous stamps and a special pop-up book.
These are pages from my copy of the USPS magazine / catalog.