Rattlebacks, 10 Pack

Spin this curious rattleback on a table and be amazed by the way it moves!
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SKU:
MAS-01917
$19.95 Incl. GST
or 4 interest-free payments of $4.99
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Shake, rattle and roll with the curious Rattleback. You'll be amazed when you spin the rattleback on a table. In one direction, it spins smoothly, while in the other... it oscillates wildly and begins spinning in the other direction!

These discs may seem symmetrical, but their rotation will leave you scratching your head and wanting to know more. Discover the mystery behind the rattleback.

Also known as a celt, these curious objects are believed to have been used by ancient druids to convince people of their power!

Age: 6+at launch.
What You Get
Rattlebacks by American Scientific. Model number 9222-23. Includes 10 rattlebacks in a variety of colours and a Teachers' Guide that features and printable student handout.

How Does it Work?
The Rattleback is a long and thin half elliptical shape formed in plastic so that it has a slightly offset center of gravity. This offset gravity causes the Rattleback to spin in directional rotation of choice, usually counterclockwise.

If you attempt to spin the Rattleback in the clockwise direction, strong preference will cause the Rattleback to "rattle" back and forth after few rotations, stopping and then reversing the rotation back to the preferred clockwise direction. The directional preference is so strong that if the Rattleback is at a stand still and you push down on one end it will begin turning.
Teach
  • Rotation
  • Gravity
WARNING: CHOKING HAZARD Small Parts. Not for children under 3 years.
More Information
Length (cm) 16
Width (cm) 12
Height (cm) 5
Age Group 11-12 Years, 12+ Years
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