Echo 4 is another devious packing puzzle from the mind of Yuu Asaka.
With only four pieces the aim is to fit them into the tray but of course it is not as simple as it first seems.
As always a fun design that is great to pass around to let others try.
The tray measures 137 x 104 x 6mm.
Comes in a neat cardboard box. Solution is not included.
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