toy:Sand Wand

Sand Wand  Can you solve the mystery of the sands?   The Magic Sand Wand puzzle is a clear acrylic wand filled with brightly colored sand which contains a silver ball.  All you have to do is get the silver ball from one end to the other through the sand. Sounds easy, but don't be so sure.   There is a scientific principal in the solution.

The Magic Sand Wand puzzle is a clear acrylic wand filled with brightly colored sand