The Hanayama Cast Dice puzzle is made up of three central pieces housed within a dice shaped frame. The aim is to remove these three pieces and then replace them in the frame.
At first impressions it seems like the pieces will just fall out but as you pull one piece out it pulss another inside making it harder than you would think.
Design by Australian Timothy Collins.
It is rated as 3 out of 6 stars on the Hanayama difficulty scale.