The Nightmare Before Christmas 12 Day Advent Holiday Puzzle Countdown is a medium-sized square puzzle advent calendar featuring characters from The Nightmare Before Christmas, including Jack Skellington. Made of cardboard and filled with puzzles, this multicolored calendar is perfect for kids aged 12-18 years old. With a festive holiday theme, this Disney branded calendar is a fun way to countdown to Christmas and enjoy the magic of the beloved Halloween classic all year long.