The Atari Keychain is one badass keychain accessory. This keychain actually hooks up to your TV and plays classic Atari games like Asteroids and Pong.
Most keychains nowadays serve a dual function. But no keychain serves as kickass a dual function as the the Atari Keychain. Having a portable video game console that fits on your keychain is a total win. The Atari Keychain comes with both paddle and joystick, and plugs into any television.