Nanodots are powerful magnetic constructors milled from a Neodymium compound – the world’s strongest permanent magnet. Each Nanodot is electroplated for duability and precisely crafted for the formation of complex structures. Nanodots are available in four colors; Original, Black, Silver and Gold and come in sets of 216, 125 and 64 pieces. Each package is reusable and can assembled into a portable carry canister.