Push-pull is a cubic box with double panels on the top side. Each panel has a 1x3 wing which sweeps into the 3x3x3 volume of the cube when the panel is opened. Five polycubes must be packed in the box with both panels closed. No trivial task, imagination and perseverance are definitely required.
Design © Theo Geerinck & Symen Hovinga
Made in PLA

• See at Puzzle Master