Simple, handson static charge detector that makes static electricity visible and easy to study. The foilbased sensor reliably indicates the presence of electric charge through foil movement, providing a clear, lowtech way to demonstrate charging and charge interaction. Key benefits Intuitive operation: bring the foil sensor close to or touch the object under test to reveal electric charge through visible foil response. No complex setup required. Effective teaching aid: designed for physics classrooms, laboratories, and science fairs to support lessons on static electricity and basic electromagnetism with practical, handson learning. Fast, reliable feedback: the foil shows charge presence quickly, helping students and instructors run repeated trials and compare results during experiments. Practical and versatile: suitable for demonstrations, lab exercises, and project work that explore charging by friction, induction, and contact. What it does and how it helps Function: detects static electric charge by using a movable foil element that responds when a charged object is nearby or contacted. This direct visual cue helps learners link theory to observation. Problem solved: removes ambiguity in identifying charged versus neutral objects during classroom experiments, reducing set up time and improving the clarity of demonstrations. Standout quality: simple mechanical response rather than electronic readouts, so it is durable, easy to interpret, and well suited to repeated handson use. Important attributes Sensor type: foilbased detector for clear mechanical indication of charge. Performance: quick visual response suitable for teaching, demonstrations, and basic laboratory work. Compatibility: works with common classroom materials and experiment subjects such as balloons, plastic rods, combs, glass rods, and other items that can acquire static charge. Portability: compact and easy to handle for classroom circulation and student use. Typical use scenarios Physics classroom demonstration: show charging by friction with a balloon and wool, then use the foil sensor to compare the charged balloon to an uncharged object. Laboratory activity: have student groups test a set of materials to learn which materials acquire and retain static charge, recording foil responses as experimental data. Science fair project or handson lesson: use the detector for experiments on charge induction, charge transfer, or to illustrate Coulombic attraction and repulsion with simple apparatus. The design emphasizes straightforward, repeatable results for teaching and learning static electricity and basic electromagnetism without electronic complexity.