Artec block school mass setArtec block school mass set You can create and study various math problems! Comes with a textbook containing 40 problems! 960 pieces, 3 textbooks included Basic square: W20 x H20 x D20mm, triangle A: W20 x H20 x D20mm [Basic Squares] Red, Blue, Water, Yellow, Light Green x 96 each, Pale Orange, Light Gray, Brown, White, Black x 32 each [Triangle A] Red, Blue, Water, Yellow, Light Green, Pale Orange, Light Gray, Brown, White, Black x 32 each ABS