The 75981 LEGO Harry Potter Advent Calendar is a 335-piece set that includes 24 gifts, each representing a surprise from the Harry Potter universe. With a blue color scheme and plastic material, this set is designed for ages 4 and up, appealing to fans of fantasy, seasonal themes, and movies. As a complete set released in 2020 and retired in 2021, this LEGO set comes in a box packaging and is a must-have for any Harry Potter enthusiast looking to add a touch of magic to their collection.