Easy Electronic Kit Build - Cicada Sound Simulator (part1)
Nice easy electronic kit build. This unit simulates the sound made by the Cicada - a large insect found in warm countries, that produces a high continuous sound (apparently). In part 1, all the resistors are fitted.
http://www.icstation.com/cicada-sound-analog-circuit-suite-multivibrator-kits-high-frequency-music-signal-simulation-electronic-kits-p-10880.html
http://dictionary.cambridge.org/dictionary/english/cicada
https://en.wikipedia.org/wiki/Cicada