Spark Curiosity with an engaging chemical change investigation, exploration & a secret message STEM project! We have taken the classic "reaction in a bag" lab up a notch by applying the scientific method and engineering design process. Students will investigate evidence of a chemical change, acid-base reactions, and the pH scale using red cabbage juice. We organized this project-based unit so you can bring chemistry to life with Grades 4–8. ✅ What’s Included: Teacher Background and Tips – A c