MoYu Hanoi Tower 6 Layers brings the Tower of Hanoi off the screen and onto the desk.

Discs slide one at a time between pegs under the old rule that a bigger disc never sits on a smaller one.

Six layers need at least 63 moves to solve, enough to fill an evening without turning into a marathon.

If six proves too friendly, the eight and ten layer versions multiply the required moves sharply.