Slime Advent Calendar 2025. Celebrate the season with this 12 day countdown of a variety of slimes kids will love to play with. This calendar is a one of a kind stem, asmr, sensory gift for any christmas countdown!
Check out our advent slime calendar selection for the very best in unique or custom, handmade pieces from our slime & foam shops. Perfect for slime enthusiasts, this calendar brings a new surprise every day leading up to the holidays!