Meet the Backyard Brains Heart and Brain Spikerbox: an educational kit that lets you view and record EKG and EEG on your smartphone, tablet, and computer using the Spike Recorder software. It comes with experiments that show you how to go about recording your EEG and EKG signals using the included electrodes.
You can use the EEG headband to record your brainwaves. The companion software also lets you record electrical deflections of the eye.[where to get it]