Creative: Behind each door is a brand new model to build allowing your child to create 24 different decorations. Building block advent calendar: Get your hands on a building block advent calendar. Compatible: Works with existing leading building block brands. Material: Each model consists of individual plastic blocks that can be assembled together. Fun: A great take on the traditional advent calendar, including a surprise model! Gift idea: A fantastic present to keep kids busy during the countdown to Christmas! Building Block Advent Calendar | Living Social