🧠 Brain Reaction STEM | How Fast Is Your Brain? | Reaction Time Experiment (K–2) Get students excited about science with this fun and interactive Brain Reaction STEM Activity! In this hands-on experiment, students test how fast their brain and body react by measuring reaction time using a simple ruler drop test. Perfect for Kindergarten–2nd grade, this activity introduces basic neuroscience concepts in an engaging, age-appropriate way. 🧠 What Students Will Learn Students will: Understan