🐟💧 Save the Fish! – Pollution Filter STEM Challenge (Kindergarten–Grade 2)Teach students about water pollution and environmental responsibility with this engaging hands-on STEM challenge! In Save the Fish!, students become young engineers as they design and build a water filter to help clean dirty water and protect fish habitats. This activity uses the Engineering Design Process in a simple, kid-friendly way—perfect for Kindergarten through Grade 2. Students will imagine, plan, build, te