Nanoblock Hammerhead Shark Building Kit This stealthy ocean predator in a steely blue and white patrols the seas, special parts make the tail and fins moveable for added realism (120 pieces, Level 2) Nanoblocks are a superior building experience with greater challenge, sophistication and detail than any other construction set Build models with incredible detail, astounding authenticity and unparalleled realism, results unmatched by other block-based systems With bricks as small as 4mmx5mm and manufactured to the highest tolerances for a perfect fit, make amazing 3D art that fits in the palm of your hand The Smaller the Brick the Better the Build; all sets come with detailed step by step instructions, for ages 12+