A special set from 2020. A set only available to employees and related parties. I purchased it on eBay and have been storing it. This set is themed around the 40th anniversary of LEGO Education. It features a design that makes extensive use of gears, and the factory's conveyor belt actually moves. It depicts the elves preparing for Christmas in the factory. The third image shows detailed photos of each element. No. 4002020 919 pieces 1 minifigure: Elf There is a tear in the box from the time of purchase, please see the fourth image. Only those who understand this are welcome to purchase.