Plus-plus is a new kind of construction toy. its one simple shape produces endless possibilities - assemble them flat to create a 2-d mosaic or work in 3-d to make more complicated structures. even curves are possible thanks to the unique design of this deceptively simple shape! precision crafted in denmark, all plus-plus sets are compatible with each other. this 1200 piece neon pack comes with mix of neon blue, green, pink, yellow, orange and clear. safe for ages 3 and up, and endless fun for a broad range of ages. designed and manufactured in denmark. new breed of construction toy. construct simple flat 2d mosaics or elaborate 3d creations. simple enough for the young - but expansive enough for older builders too!