Brain power

The girl on the left just launched the toy helicopter using her brain waves. She's wearing a version of the $99 NeuroSky headset to transmit to an iPad which controls the copter. 

I tried it and was also able to get the copter aloft. The secret, according to the NeuroSky folks, is to clear your head of distractions and focus on one thing, like math problems. 

The company says their  instruments measure brainwave EEG and heartbeat ECG signals to entertain, relax, detect, heal, and exercise the most vital of our organs.
 
I want a version that works with a lawn mower.