Open a numbered box each day, discover a new mini brick build, and add it to your growing holiday scene. Please Note: This is 3.6 mm mini Building Block Set and not compatible with major brands 24-Day Christmas Advent Calendar Building Set - Turn the wait for Christmas into 24 days of building surprises! From little festive details to colorful shops and characters, watch your Christmas main street come alive day by day until the full celebration is ready for Christmas 2026 Christmas Countdown City Building Kit - There’s something festive around every corner!