This is a simple and clear puzzle that simply breaks down the cube and returns to its original shape, but it is quite difficulty and youll be embarrassing that time passes.
Each block is strung with rubber so you dont have to worry about losing parts.
Safe to play on train, airplane, or even in the car.
Made of wood for warmth and is recommended as a gift.
(From Amazon.co.jp)
It is connected with an elastic cord, so do not force it to pull or shake it