I wonder how can I make the sound of a mosquito or a fly or any kind of insect? I prefer a comic sound.
A bread and butter way is using a comb with thin paper, put the paper on top of the comb, covering the upside completely, with the teeth pointing at you, and blow between them. Might take a little practice, but does indeed work well!
Jimmy Macdonald was Disney's first sound effects designer and he is responsible for so many of the quintessential cartoon sounds that we associate with. He does a pretty good job of the talking fly/mosquito sound using rubber tubing attached to a kind of drum skin. You can see a demonstration of the sound in this documentary (highly recommended viewing for some general inspiration).
Disney Family Album #4 - Jimmy MacDonald
Rub your knuckles or finger nails fast enough. Record about 20-30 seconds, use a high-pass filter on the recording to get rid of the unnecessary low end, then pitch it up until you get a buzzing sound. It would resemble little wings. :)
You can use various objects to get different timbres with this technique.
Use FL Studio, and use a violin plugin like here