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Rattleback - Science Toy by Tedco Toys

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Rattleback - Science Toy by Tedco Toys Sometimes called a celt, rattlerock, wobble stone, or anagyre, this rattleback is sure to amuse young and old. Spin the rattleback in one...
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₹. 290.00

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Rattleback - Science Toy by Tedco Toys


Sometimes called a celt, rattlerock, wobble stone, or anagyre, this rattleback is sure to amuse young and old. Spin the rattleback in one direction and it spins as expected. Spin the rattleback in the opposite direction and it "rattles", stops and spins in the opposite direction seemingly violating the law of conservation of angular-momentum. Colors vary and are selected randomly
  • A science curiosity whose ancient and mysterious properties capture the attention of all ages
  • This little oddity has a natural spin bias and is a cylinder lens that magnifies vertically.
Place your Rattleback, curved side down, on a firm surface, like a tabletop, and spin it counterclockwise. It should spin freely. Now try to spin it clockwise. Notice that it begins to wobble and slow then reverses direction.
The Rattleback is shaped much like a canoe, but its keel is not parallel with the rest of the boat. This causes the center of gravity to shift right or left depending on which end of the 'keel' is in contact with the surface it sits on. Try simply setting your Rattleback on a table. Without trying to spin it, press down and release one end. As it rocks, it will begin to spin.

Ages 6 and up

This product will be shipped in 45 days