It is possible to build your own microphone, Tin Can Microphone Kit promises that you will get a cool microphone that sounds like a vintage AM radio. This device would be perfect for vocals and harmonica, a simple kit for both children and adult. No soldering needed, you have everything you need to build your mic, it features “tuning balls” system where you can adjust the tonal quality of this device. This kit was designed and developed by Shane Speal, it was tested on concert stage and recording studio as well. However, some tools might be needed when you build this kit: hot glue gun, hand drill, drill bits, and adjustable wrench. [Buy It Here]