RED Radio-Controlled Baboom Flying Saucer (Indoor Blimp/Balloon) 27MHz RC UFO Red Mylar Balloon 360 Degree Turns * Requires Helium * Precision Movement Dimensions: 38 inches in diameter * Materials: Nylon, plastic. Flying Saucer bag must be filled with helium (available at party stores & flower shops) Manufacturer's Suggested Age Range: (6) and up Includes a two-channel hand-held transmitter (27MHz) with antenna.