Spooky Simpsons Countdown Behind each door of this The Simpsons Treehouse of Horror 13-Day Countdown Calendar lies a creepy-cool surprise, featuring some of your favorite Springfield residents reimagined for Halloween. From mutant Bart to vampire Mr. Burns, these 2-inch Pocket Pop! figures bring the laughs along with Treehouse of Horror frights. Whether you're counting down to the holidays or just feeling ghoulish, this calendar is the perfect way to add some quirky fun to your Simpsons display!