Educational function: the stone collection set designed for children will surprise your little geologist, which will awaken your children's curiosity. The Christmas countdown calendar helps relieve stress and improve concentration. It is also a great way to teach children numbers, time concepts and the art of patience. Safety material: Christmas crystal advent calendar is made of high-quality, safe and non-toxic materials, is safe, durable and lightweight. The ore is finely polished and polished and the feel is very good. It is smooth enough not to hurt children's hands. It is an excellent gift for girls and boys. Strong festive atmosphere: the Christmas countdown is an exciting time for children, open the small door to reveal the surprise stone. Every day from December to Christmas is a fun experience, with a countdown calendar a way to increase your holiday expectations. This is a collection of crystals, stones and stone minerals from around the world to give children different surprises and fun for 24 days. Creative surprise: 24-piece ore box crystal advent calendar, which contains many crystals, natural ores and raw stones, which express happiness and happiness, are naturally valuable and can be collected forever. With daily changing surprises that make a lasting attraction for children. Widely used: the crystal advent calendar is suitable for girls, boys, children, adults and teenagers to meet the needs of different age groups. Crystal repair stone kit also suitable for children's birthday gifts, daily gifts, school prizes, preschool props, teaching aids, parent child interaction and Christmas gift bags. Note: Cannot eat. Please do not put in the mouth, children under 3 years are not suitable for use. Colour: As Shown Material: Ore Package Contents: 1*Christmas Advent Calendar