At 3.6 grams, this Carbon Butterfly is the lightest RC plane in the world. And because it's made out of Carbon Fiber, it's got the strength of steel but the flexibility of a 14-year-old gymnast.
It has a range of 400 feet, and is directed by a 4xAA RC remote control. It's a little pricey at $300, but it also includes a carrying case. You can even fly it around your living room dive bombing your little sister and aggravating your father's hypertension.