The Pogo Sketch, cast in aluminum and made with an anodized silver finish, lets you use your MacBook's trackpad as you would a pen tablet—enabling you to sketch and illustrate in drawing programs and artistic applications more naturally and accurately than you could with your finger alone.
The Pogo Sketch features a tip that "acts as a bridge by transferring the signal from the display to the user’s hand," according to the manufacturer.
The Pogo Sketch also works with the iPhone and iPod touch.