💧 Water Absorption STEM | Which Materials Soak Up Water Best? (Kindergarten–Grade 2)Turn simple materials into a fun science investigation with this hands-on Water Absorption STEM activity! Students explore how different materials interact with water while testing, comparing, and discovering which ones absorb the most. This activity introduces the concept of absorption, defined on page 2 as when a material soaks up liquid, helping students build a clear and age-appropriate understanding bef