Here's a Sonic theme calander. It looks Christmas-ey, so it is an advent calander. It was for the year 2008. It is made of thick paperboard and is full of little doors. You open one for each day on the countdown to Christmas. However, the doors appear to be randomly numbered (ie. the 13th is on the 2nd row, and the 24th is on the top row, etc--but why?) Inside each little door is a normal chocolate (but of good quality--though it wasn't Sonic-shaped or anything) to eat. Once the season has ended, you could likely close all the little doors and end up with a Xmas themed Sonic decoration.