Abstract: In a helicopter toy, a plurality of rotor blades are mounted to a flying body for rotation about a rotational axis and for angular movement about their respective pivotal axes extending perpendicularly to the rotational axis so that the rotor blades have their respective angles of attack which can be altered in pitch. An attack-angle altering unit is provided for altering the angles of attack of the respective rotor blades such that, when a power is transmitted to the rotor blades from a power source to rotate the rotor blades about the rotational axis, the angles of attack of the respective rotor blades are brought to their respective plus pitches to climb the flying body, while, when the transmission of the power from the power source to the rotor blades is released, the angles of attack of the respective rotor blades are brought to their respective minus pitches to cause the flying body to descend.