NATIONAL GEOGRAPHIC Science Advent Calendar 2023 – Jumbo Kids Advent Calendar with 24 Science Experiments, Rocks, Fossils, Plus Storage Bag, Science Christmas Countdown Calendar, Mini Gemstone Dig Kit

NATIONAL GEOGRAPHIC Science Kit & Rock Collection Advent Calendar 2024 – Jumbo Advent Calendar with 24 Days of Science Experiments, Gemstones & More for Kids, STEM Projects for Kids Ages 8-12

NATIONAL GEOGRAPHIC Gemstone Advent Calendar - 2024 Advent Calendar for Kids with 24 Gemstones to Open Each Day, a Complete Rock Collection Christmas Countdown Calendar with Mini Gemstone Dig Kit

Blue Marble NATIONAL GEOGRAPHIC Dinosaur Advent Calendar 2024 - Christmas Countdown Calendar with 24 Dino Activities & Figures, Paint A Dinosaur, Create a Clay T. Rex, Excavate a Dino Tooth Replica