I learned that the more d-cells you have the brighter the light bulb is. You need a d-cell to power the circuit. The positive charge had to touch the metal and the negitive charge touchs the gray ball and the light bulb lights up. If the negative and positive both touch the gray ball on light bulb does not light up. There needs to be be a full circuit for it to work. You will need these things to make the bulb light up. You will need one wire, one d-cell and one light bulb. Put the wire on one side of the d-cell and wrap it around the metal on the bulb then put the gray ball on the other side of the d-cell and it lights up.
(:Noah:)
(:Noah:)
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