Features 1. Surprise for Every Day: Celebrate a happy Christmas with this 24 days of christmas countdown calendar box. 24 small windows will be open throughout December until Christmas. Kids open a panel to reveal a special rock, mineral or gemstone With this Christmas advent calendar, find happiness every day and you will get different surprises each day. 2. Rock Collection: This stunning rock collection kit includes 24pcs different rocks and minerals including onyx, turquoise, jasper, tiger's eye, malachite, etc. You'll also receive a learning guide, allowing your kids to learn about each rock and fossils and easily identify each specimen. This is awesome for your starter collector. 3. Perfect for Kids and Adults: Christmas calendar countdown, creative and funny to discover. The days on the countdown to Christmas page are all scattered so it makes it a fun scavenger hunts. This Christmas rock collection calendar kit is the perfect way to inspires a lasting love of geology for all. Whoever child or adult would love to explore the 'secrets' in the box during the whole month. 4. Easy to Carry: These Christmas advent calendar fillers is lightable, can take around anywhere to play with any time, so kids have an activity to do no matter where they are. Brings everyday surprises to boys girls while waiting for Christmas coming, a lot of fun. 5. Christmas Countdown Xmas Gift: These Christmas advent calendar packs is great gift for your kids, sons, daughter, granddaughter, boys and girls as Christmas gifts, Christmas fillers, goodie bag fillers, party favors, birthday gift, school prizes, preschool props, teaching aids parent-kids interaction. Specification Material: Ore Color: Multicolor Size: 21 x 5 x 16 cm Weight: 400 g Package Include: 1 Christmas Countdown Calendar Rock Box