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Rattleback - Multicolor Pack of 10 - Image One


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Rattleback - Multicolor Pack of 10

by xUmp.com   Item#: 14486   5 star rating 16 customer reviews
List Price:$19.99
Sale Price: $9.50 /each
You Save: $10.49 (52%)
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A rattleback is one of the simplest and coolest physics toys! It will behave differently when you spin it clockwise or counterclockwise. The shape of this toy is very curious and it produces an unexpected effect when you spin it. This set features 10 rattlebacks in a variety of colors. Makes for some cool desk toys or stocking stuffers.

Features:

  • Set of 10 multi-colored rattleback toys
  • Cool toy with mysterious spin-reversal motion
  • Behaves in seemingly opposite ways when spun clockwise versus counter-clockwise
  • Excellent for physics demonstrations or as an interestting desk toy


Age:
8 +
Box Size:
4.50 x 3.75 x 1.50 inches
11.43cm x 9.53cm x 3.81cm
Weight:
0 lb 5 oz
0.13 kg

Warning:
CHOKING HAZARD
Small parts. Not for children under 3 yrs.

Customer Reviews


5 star rating  Great fun.
M.H. from Mountain Top, PA
Told my 8 and 10 year old grandsons: when you figure out how they work you"ll be smarter than me. Both said they will learn how they work.

5 star rating  Rocking the Rattlebacks
Jan from Overland Park, Kansas
Love they come in a pack of ten. I use these in science for the students to explore and research. Wow people have studied these little items for awhile. Check them out on the internet.

5 star rating  Rattleback
Bill Soukes from New Mexico
The item was as expected and it was shipped promptly.

5 star rating  Rattleback - Multicolor Pack of 10
Bob from Augusta, GA
Great product, have used to give out to clients for years. Bought an engraver this time and added my logo too! Great for kids and adults. Service excellent!!!

5 star rating  just plain fun
Jack from ILL
I had one as a child and I wanted to pick some up for the "kids" I work with, I am passed 60

5 star rating  Rock Star
The Old Man from Bloomington, IL USA
I handed these out to a younger generation and most even put down their smart gizmos to pay attention and learn. For a while I went from old man to a rock star.

5 star rating  Fast Shipping
Allan S from Houghton, MI


5 star rating   BV from Texas, USA
Great. Very fast, very professional, excellent service and very fair price. I use them as inquiry objects and advertising ideas.

5 star rating  Rattleback
Linda Dettling from Boulder, Co. USA
The package of multi-colored Rattlebacks arrived shortly after my order was placed. I love giving them to kids and friends because they are so Interesting

5 star rating  Great scientific toy
George Streit from La Verne, California
I have been forever fascinated by these little things. I had one when I was a kid , made of wood. I've given away over 100 of them to friends or strangers, just to see their reaction to the strange toy that wants to spin in only one direction........

5 star rating  Rattlebacks Rock
John Young from Pittsburgh, PA USA
Rattlebacks defy the laws of physics. A person can't have too many. Great to pass out to grandchildren.

5 star rating  Kids love these!
Undisclosed Verified Buyer


5 star rating  Great Scientific Toy
George Streit from La Verne. Ca
I carry these toys in my pocket and give them away to children or people i like. They are great for getting people to think about why they do what they do.

5 star rating  Rattleback
Mark from San Angelo, Texas
Came on time and very pleased with the price and product.

5 star rating  Celt or Rattleback
Douglas from California
What a truly fascinating object. The CELT (or rattleback) is a semi-ellipsoidal object which will spin on its axis in a preferred direction. Place it on a flat surface and spin it in a counterclockwise direction. As one might predict, it will spin, slowing down as the frictional force acting on the Celt from the supporting surface eventually brings it to a stop. Now, spin it in a clockwise direction and observe. It becomes unstable, yaws back and forth, stops then reverses its spin to counterclockwise. This spin-reversal motion seems to violate Newton's angular-momentum conservation law of physics which is, stated simply, objects in motion remain in motion until acted upon by an external force. Most Celts exhibit this phenomenon when spun in one direction, but not when spun in the other. Some exceptional Celts will reverse when spun in either direction. This makes the Celt a physical curiosity that has perplexed human imagination since prehistorical times. These are made of plastic, but stone and wood Celts have been found at ancient archeological digs sites (so I have read). D.J.S. Professional Civil Engineer

5 star rating  Saved Big buying the 10 pack
Mike Daily from Newtown, PA
Ok so I only wanted one of these, after seeing it on Youtube. Most websites have them listed somewhere between $2 - $5 each. Which isn't too bad, but with shippping it's between $7 - $10 for ONE plastic rattleback! Needless to say I kept searching. I found this 10 pack which brought the cost down to .89 cents each. Add the shipping and it came to $14 total for 10. You do the math. 1 for $10, or 10 for $14? I kept a few of different colors and gave the rest to my nieces and nephew.


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