While I think that quadrocopters are cool, they tend to be big devices. That’s why I like this tiny quadrocopter, which only weighs 20 grams. It’s basically a PCB with some rotors on it, which is why it is so light. All of the telemetry is being handled on a computer, so it’s essentially a thin-client UAV, which is even more awesome (awesomer?).
Read more @ Technabob