Rattleback from San Jose Scientific

A rattleback, also known as an "anagyre", "celt", "Celtic stone", "rebellious celt", "rattlerock", "spin bar", "wobble stone" or "wobblestone" and by the product names "ARK," "Bizzaro Swirls," "RATTLEBACKS," "Space Pet" and "Space Toy," is a semi-ellipsoidal top which will spin on its axis in a preferred direction. But, if spun in the opposite direction, it becomes unstable, "rattles", stops and reverses its spin to the preferred direction. http://www.sanjosescientific.com

Category:

Science & Technology

Tags:

• rattleback
• anagyre
• celt
• cetic stone
• rebellious celt
• rattlerock
• spin bar
• wobble stone
• wobblestone