Features: 1. Christmas Advent Calendar 2025: Are you still looking for the perfect Christmas gift for your kids?our Advent Calendar Brain Teaser is the perfect way to celebrate the Christmas.Your child will love opening the 24 windows to reveal 12pcs 3D metal puzzles and 12pcs wooden puzzle unlock interlock toys.Enjoy a perfect Christmas vacation by completing these challenges. 2. Safe and Durable Design: 3D metal and wooden Brain Teaser puzzle Advent Calendar made of metal and wooden that smooth, burr-free and designed for safe play.Reusable brain teaser toys is strong and durable that doesnt easily bend or break,easy to take anywhere you want. 3. Brain Teaser Puzzles for Kids andamp; Adults: Brain teaser Advent Calendar is not just for kids; adults can also enjoy and learn from solving the puzzles as well. Designed to cater to different ages and levels, this gift box is perfect for boys, girls, kids, adults, teens, and more!Whether you're a puzzle enthusiast or just starting, our calendar has something for everyone. 4. Challenge Your Mind: These IQ puzzle toys provide brain busters, stimulate creative thinking, help boost early education and promote STEM learning, and develop a healthier way to practice focus and concentration.Engaging intellectual fun for kids and adults, fostering a sense of accomplishment while distancing from video games. Specifications Product size: 35 x 20 x 5.5cm Product packaging: Color box plastic packaging Product weight: 700 grams Package included: 1 x Christmas Advent Calendar Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.