Rattlebacks: Celt Stones


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Rattlebacks (Set of 2)
SS-300

Prices:

1 - 5:

$2.95 ea.

6 or more:

$2.50 ea.

Qty:

Rattlebacks (Set of 12 in bulk)
SS-335

Price:

1 or more:

$14.95 ea.

Qty:

Rattleback Factory Seconds (bag of 30)
SS-323

Price:

1 or more:

$24.95 ea.

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Shipping Information

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A Rattleback is a half-ellipsoid object carved so that it will spin in only one direction. Accidentally discovered by archaeologists, this curious object was first dubbed a celt stone, named after the prehistoric axes and adzes they were studying. Idly spinning one of these ancient tools on the table, these scientists must have been surprised to discover that the seemingly normal piece of carved stone would spin freely in one direction but would reverse itself if spun in the other direction.

Don't miss our Factory Seconds. Work as well as the original, just not as pretty.

Dancing Robots (2 per package)

Great for observing a simple wind-up machine that changes elastic potential into kinetic energy.

Kick It Stick It

Requires no batteries. Includes rechargeable power pack with up to 30 minutes of play on a single charge.

Pulleys

High-quality, low-friction pulleys, perfect for simple pulley experiments.

Wacky Hall Walker

Investigate the amount of potential energy given the rubber band vs. the distance traveled by the wacky hall walker.