Advent calendars–those countdown calendars with little doors or tabs that can be opened each day of the month–are a visual, hands-on way to deal with counting the days ’til Christmas. The idea falls somewhere between a card and a gift, with the added excitement of having each day be a chance to reveal a new bauble, bonbon, potion or prize. Both the ritual of finding out what’s behind the door–and getting to enjoy it–can be almost as fun for grown-ups as kids. Below are 12 cool countdown calendars stocked with treats from chocolates and tea to Marvel figurines and “Game of Thrones” socks (yes, really.)–and one DIY version you can fill with whatever you like.