Audience: Students; Grades: 4-5; Subject: Science. (2004) Demonstrates how much we rely on electricity. Beginning with experiments in static electricity, introduces atoms, protons and electrons, positive and negative charges. Illustrates the principle of repulsion and attraction of charges. Experiments with a charged comb illustrate electric force and electric fields. Shows how an electroscope works and how charges are measured by this instrument. Electrical discharge is demonstrated by walking across a carpet and touching a door knob. The concepts of negative and positive charges and electrical discharge are applied to lightning strikes. For the teacher's guide go to: https://drive.google.com/folderview?id=0B9ZT7PYcIjLfNjl1a2hfcUhLTFk&usp=sharing