Description: Material: plastic Size: 310*225*50mm Specification: Christmas countdown is an exciting time for kids. Using a countdown calendar is a way to increase holiday expectations. The Advent Calendar is a amazing Christmas gift 24 days every single day there will be new surprises! This advent calendar is made of high-quality materials suitable for adults and children over 3 years old. Includes rough and polished samples of rock. Makes an excellent gift for girls and boys! The toy advent calendar is a fun way to allow children to count down every day until Christmas and get some surprises every day. That can develop their patience. This toy can keep your child away from electronic products reduce stress and you can also practice numbers and counting skills with kids! And with rock collection set for kids and surprise your little geologist that will spark your kid's curiosity and love for science and geology. This is an ideal Christmas gift for children over 3 years older. Great Science Gift for Mineralogy & Geology Enthusiasts. includes: 1x Blind box