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This is going to be a popular one! Amazon has a 24 Days of Slime and Charms Kit Advent Calendar! It’s $20.99 (there’s also a 10% off coupon to clip on Amazon) and includes 8 pots of slime in assorted colors and 23 different mix-ins.
From Amazon:
ADVENT CALENDAR 2022- Have a ball with this fantastically slimy advent calendar!
24 DAYS OF FUN- Includes 8 pots of slime in assorted colors and 23 different mix-ins.
BRING OUT KIDS CREATIVITY- This kit has a wide variety of charms, sprinkles, clay slices and slime colors to be used to make each container extra unique.
CHILD SAFE- Our slime is safe and nontoxic, formulated for use by children.
PLEASE NOTE- Slime is not Edible!! Always wash your hands before and after handing your slime.