General description A fun mineral box that adds excitement to the Christmas season! From December 1st to 24th, a different mineral is hidden behind each door of this puzzle box, offering new surprises every day. This advent calendar not only helps you learn about and identify various rock, gemstone, and mineral types but can also be used as a countdown calendar. The surprise box contains 24 minerals in various colors and shapes, making it an engaging and educational gift for children. Technical specifications Contains 24 different minerals Colors and shapes vary Designed for educational purposes Gift This toy set is perfect as a Christmas gift, children's birthday gift, everyday gift, school prize, preschool supplies, teaching aids, and for parent-child interaction. It also makes a delightful addition to any Christmas gift bag. Other information