Dave Hax (previously) shows how to make a matchbox microphone out of a generic matchbox and pencil leads. To hook up into the homemade microphone, wires with clips and a pair of headphones or speakers are also needed.
Listen to sounds and music from the other side of the house using this DIY microphone. Simple audio electronics project. You will also need a battery, some wires and clips, and a pair of headphones or a speaker. Fun and simple science experiment, and great to do with children.