This is the 243-piece LEGO advent calendar that surprises young superheroes with a Marvel Avenger character or themed mini-build each day as they count down to Christmas. The excitement builds as kids open each of the calendar’s 24 doors to reveal a delightful LEGO surprise from the Marvel Cinematic Universe, including a mini Quinjet and the Hydra Train. The back of the calendar folds down to create a play mat where Avengers in training can act out their imaginary Marvel adventures. Includes Spider-Man (with web shooter), Iron Man, Captain America, Doctor Strange, Wong, Okoye, and Black Widow minifigures. Ages 7 and up. Box 10" H x15" W x 2 1/2" D. (1 lb.)