Electricity exploration set B spring connector (Plus)

Electricity exploration set B spring connector (Plus) consists of two bulb holders, two bulbs, two battery holders, two AA size alkaline batteries, one knife edge switch, one circuit tester, one set of material strips and five fork connecting wires. The fork terminal connecting wires and spring connectors allows easy connection of the circuits.

This set can allow students to investigate : 

(1) the properties of light bulbs connect in series and parallel.  

(2) materials which are conductor or insulator