Premium Sand Timer - 60 Minute Glass Hourglass for Productivity, Meditation & Time Management - Perfect for Home, Office, Classroom & Yoga Studio

This puzzle is made by combining two pieces each of two similar, but slightly different shapes. They are carefully calculated, with tricky movement added. It is impossible to unravel with one linear movement. Designed by Korean puzzle creator JinHoo Ahn.

Level 6 Difficulty