Hammacher Schlemmer sells what they call the World's Smallest Indoor Remote controlled Helicopter.

The R/C indoor helicopter measures 6"x6 1/2"x 5" H. It has two contra-rotating coaxial rotors that use gyroscopic inertia to keep the copter balanced and two micro-motors that spin the rotors at varying speeds, resulting in precise and effortless 360 degree movement up to a range of 50'.
To top things of the small flying gadget features two flashing LEDs allow nighttime or darkened indoor flights.

Hammacher sells this R/C indoor helicopter for $79.95. Indoor helicopters are supposedly very hip right now. Not sure why. They are sure great to bother your family. More R/C Helicopters.