Compatible with Lego Advent Calendar 2025 2-in-1 Christmas tree building blocks 1. open numbered small boxes daily to build 1 Christmas decoration (24 styles total). 2. mix all bricks to assemble a large Christmas tree. Combines countdown fun and decorative function. 24-Day Surprise Countdown 24 individual packages contain 24 buildable small models with vivid Christmas elements. Small models can be disassembled and reassembled into a large Christmas tree, unlocking daily surprises, suitable for teens and more. Premium Material & User-Friendly Design Made of safe ABS material (odorless, no sharp edges) with easy-to-connect bricks. Includes an exquisite gift box and reusable numbered small boxes; large-sized bricks are kid-friendly for assembly, with assembly instructions included. Family Christmas Interactive Item Ideal for family participation works as a parent-child game to develop creativity, or team up with family/friends to build the large Christmas tree together, enriching holiday gathering moments. Ideal Christmas Gift for All Ages Elegant packaging fits kids (8+), teens and adults. Serves as a Christmas toy, countdown calendar, and home decoration, adding warmth to the holiday. Merry Christmas, My Friend