This toy perfectly combines the romantic atmosphere of Christmas with intellectual challenges. It uses an exquisite advent countdown calendar as the carrier, with 24 small drawers or small grids arranged in sequence, each of which hides a nine-link component. Starting from December 1st, open a small grid every day and take out a component, as if preparing step by step for the arrival of Christmas. Each small grid is decorated with Christmas elements, such as snowflakes, Christmas trees, gift boxes, etc., with bright colors and full of festive atmosphere. When you carefully open a small grid every day and take out the component, it seems that you can hear the sound of Santa Claus's bell getting closer and closer, making the whole countdown process full of ritual and expectation, so that children and adults can immerse themselves in this joyful Christmas countdown. Intellectual challenge, endless fun