Six-Piece Interlocking Puzzle - Hard Difficulty

toy display hexagon puzzle mini desk brain print small filament test triangle star game polygon art geometric sculpture fidget mechanical red easy shape hard printable teaser smooth classic square medium interlockingpuzzle novelty brainteaser construct sensory relax entertainment mindgame iqpuzzle assemble burrpuzzle durable angular stress singleplayer symmetry challange lowfilament gluefree