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Spinning gee-haw whammy diddle The gee-haw whammy diddle.. A gee-haw whammy diddle is a mechanical toy consisting of two wooden sticks. One has a series of notches cut transversely along its side and a smaller wooden stick or a propeller attached to the end with a nail or pin.
For most rattlebacks the motion will happen when the rattleback is spun in one direction, but not when spun in the other. Some exceptional rattlebacks will reverse when spun in either direction. [1] This counterintuitive behavior makes the rattleback a physical curiosity that has excited human imagination since prehistoric times. [2]
Such toys have been used since antiquity in solitary or competitive games, where each player tries to keep one's top spinning for as long as possible or achieve some other goal. Some tops have faceted bodies with symbols or inscriptions, and are used like dice to inject randomness into games or for divination and ritual purposes.
[1] [2] Fidgeting may involve playing with one's fingers, [3] hair, or personal objects (e.g. glasses, pens or items of clothing). In this sense, it may be considered twiddling or fiddling . Fidgeting is commonly used as a label for unexplained or subconscious activities and postural movements that people perform while seated or standing idle.
A fidget spinner or hand spinner is a toy that consists of a ball bearing in the center of a multi-lobed (typically three-lobed) flat structure made from metal or plastic with metal weights in the lobes, designed to spin around its central axis. Fidget spinners became very prevalent trending toys in 2017.
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The effect relies on a motion perception property called beta movement: motion is seen between two objects in different positions in the visual field at different times providing the objects are similar (which is true of spoked wheels—each spoke is essentially identical to the others) and providing the objects are close (which is true of the ...
The toy has traditionally been thought to demonstrate the principle of persistence of vision, a disputed explanation for the cause of illusory motion in stroboscopic animation and film. Examples of common thaumatrope pictures include a bare tree on one side of the disk, and its leaves on the other, or a bird on one side and a cage on the other.
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