You may know NeuroSky as the (cough) brains behind Mattel's Mind Flex game. Here's the company's latest. The MindSet headphones have a medical-grade brain-wave sensor and can hook up to your computer (PC or Mac) or smartphone through a Bluetooth connection. The device also features noise-canceling technology, an omnidirectional microphone, and playback controls. MindSet comes with a brain-wave visualizer program that displays how you react to different sounds and rhythms. There's also a game called NeuroBoy that challenges you to move objects with your mind. You can grab MindSet for $199 from NeuroSky's online store, along with other MindSet games and educational applications.