Whistling Helicopter

This is a Sketch of a Whistling Helicopter:

The principle upon which the toy design is based:

Rotation, Gravity, Lift, Angular Momentum, Velocity, Aerodynamics,
Comparison of Relative Velocities, Energy Storage, and Energy Transfers

How the child will interact with the toy:

1. Attach the helicopter to the handheld launching device
2. Turn handle while observing the sights and sounds of the device
3. When desired velocity is attained, press the release button
4. Observe the behavior, lights, and sounds of the toy while in flight

Issues of Construction Costs, Durability, and Safety:

The Continuously Variable Transmission makes this a very expensive toy (but makes it significantly easier to use).  So this toy will cost a LOT (but there may also be a “value” version of the Whistling Helicopter, which uses a simple, cheap plastic pull cord instead of the CVT.)  This toy is designed to be reasonably durable and safe for everybody – no parts would pose a choking hazard but parental supervision is recommended for younger children who wish to use this toy indoors or around fragile things like crystal chandeliers, which would pose the primary safety hazard.