Packaged DISASSEMBLED for your puzzling enjoyment! This puzzle is one of the group of interlocking puzzles called burr puzzles - it has internal voids and no solid locking piece which differentiates it from less difficult puzzles with the same external shape. It is sold disassembled and you must rely on the photograph on the accompanying Presentation Card to know what shape to assemble the blocks in. This ensures you'll get the maximum value from the puzzle. REMEMBER - for when all else has failed we enclose a professionally printed solution sheet.