Inge,

Looks very much like the resistance exercise units I had seen at one time.  With the ball inside spinning you held them in your hand and moved your arms to exercise.  The gyroscope effect made for significant resistance to motion of unit when held in your hand.  Fancy resistance exercise.

Drew

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steven Creswick
Sent: Friday, February 01, 2013 9:47 AM
To: [log in to unmask]
Subject: Re: [TN] Dropbox - NTC

A toy you took from one of the grandkids?





Now: I got a remarkable thing on my desk some years ago. Can someone tell me what it is? If Steve can't put it on his wall, there is another way, but I've never used it, so you may not get the pic today.

Inge



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