Most metals like copper, aluminum, gold, silver and brass are good conductors. The longer and thicker the wire, the greater the resistance to the flow of electricity. Helpful Hints 1. Frequently test the batteries and bulbs to make sure they are working. Keep a wall chart with each vocabulary word numbered.
Children can refer to words by number.
Have plenty of equipment available for everyone. Have it organized to facilitate ease of acquisition. Due to limitations of time and short attention span, have the circuit testers partially assembled. Have the objects bagged for quick and easy distribution. Caution children about the dangers of working with electricity at home.