A PUZZLE BOX TO BUILD: With 775 pieces, this building set is a real challenge to meticulousness and patience. Assemble the pieces of this 3D puzzle with a minimum of 151 movements before solving its enigma. A BRAIN GAME TO SOLVE: Once the puzzle is assembled, all that remains is to open the box. To do this, you have a riddle to solve through a thoughtful brain teaser. Will you be able to unravel our logic games? A UNIVERSE OF ITS OWN: Embark on a space odyssey with Tetra, the gem from NKD Puzzle, inspired by the mysteries of space and the legends of Roswell. The result of precise engineering and carefully thought-out design, Tetra fuses science fiction and reality. Like an escaped piece from Area 51, this reinvented tetrahedron reveals a sequential, algorithmic puzzle in a vibrant cyberpunk design. NKD PUZZLE: NKD Puzzle is a company which values eco-friendliness. All our puzzles for adults are made in France and come in the form of model kit to assemble yourself, to make them accessible to all.