I found some useful information on this website.
Following this instructions, I tried several times.
Trial No.1
To my surprised, I can 't found a 3 volt flashlight bulb or bell wire in any hardware store around my house. So I start with the things I can bought -- normal bulbs, copper wire, Energizer Max D cell battery and electrical tape.
The battery is not powerful enough to light up the bulb. Trial No.1 failed.
Trial No.2
To increase the power, I try something dangerous. I insert the copper wire into the plug directly. I know it's dangerous but I just so curious whether the bulb will light or not. Thanks god it didn't cause the fire alarm.
The bulb do light up and then the copper wire near the bulb blows up. The blast leaves a black mark on the floor and hurt my finger. Trial No.2 failed.
Trial No.3
To make sure that at least there will be light come out, I replace the flash light bulb with mini light bulb, which found in a light shop. I even find bell wires in this shop. The fact that a light shop actually has more equipment for hand craft than a hardware shop really surprises me.
Here's the raw materials.
The circuit is simple so I didn't draw a graph before making it. To enhance the lightness of the mini light, I add a transparent egg carton on it.
Trial No.3 succeeds.
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