This Radiant Thinking Ball is a fun demonstration of what is happening to your brain.
(also known as Hoberman Expanding Sphere after its inventor Chuck Hoberman )

http://en.wikipedia.org/wiki/Hoberman_sphere

The million million neurons in our brain start making all sorts of connections, radiating out from the first thought/concept.

Great for Teachers, Trainers, Parents and Buzan Licensed Instructors as well as a fun fiddle factor on your desk at work.

You may want to buy two as your colleagues and kids will want to keep playing with it.