Mindball is a two person game controlled by players’ brain waves. Mindball is produced by the Swedish Company Interactive Productline. The concept originates from the prototype Brainball which was developed by the Smart Studio at The Interactive Institute also in Sweden. Mindball requires players to relax so that they can focus. Players with lower Alpha and Theta waves are more likely to succeed. The players’ brain activity is graphically displayed so that the public can follow the players’ mental processes during the match. The table can be purchased for approximately $20,000.