Electricity Kit – Worcester Circuit Board, Complete Kit. Great middle school and high school electricity kit, for teaching basic principles of electricity. Teaches concepts of:1. Current in motion2. Cells in Series3. Cells in Parallel4. Current in parallel Branches5. Opposing the current (Resistance)6. Controlling the current. Variable resistance7. Heating by Current8. Fuses9. Driving the current: Voltage10. Voltage and current11. Conductors and insulators12. Electricity in the home: Wiring13. One-way conduction f elections: Diode14. ElectromagnetismKit Contents:1x Baseboard1x Instruction booklet3x Battery Holders20x MES Bulbs 2.5V10x MES Bulb Holders with Connectors12x Connectors1x Rotary Rheostat with Connector1x Resistor 3.9 OHM with Connector1x DIODE WITH CONNECTOR2x Alligator Clips2x Alligator Leads2x Banana Plugs Leads2x Switch with Connector2x Nails 75mm1x Bare Copper Wire 24 SWG1x Eureka Wire 34 SWG1x PVC Coated Copper Wire1x PKT Pencil Leads / Carbon Rods1x Steel Wool1x Electrode Support Disc1x Copper Foil