Advent Calendar 2025 Slime. Our sensory slime studios advent calendar comes with 12 different (2.5 ounce) jars of slime and 12 bags of extras (that go with each slime). The slimy advent calendar features 24 different slime surprises behind each window.
Our sensory slime studios advent calendar comes with 12 different (2.5 ounce) jars of slime and 12 bags of extras (that go with each slime). This unique advent calendar offers 24 days of slime fun, providing a new and exciting slime experience each day leading up to the holiday season.