The New $99 Neurophone
One of the original brain hacking devices was the neurophone invented by Patrick Flanagan in 1958 when he was only 13. The neurophone brings the left and right hemispheres of the brain into balance and increases IQ. Unfortunately, to get one today cost $800.
There is a crowd funding movement afoot to fund a $99 neurophone, slated to come out around Q3 2015. Here is a link to the website: http://www.newneurophone.com/
If you are one facebook, there is a group at this link: https://www.facebook.com/groups/neurophonevolunteers/