The bright colours of the various 161 pieces assist in emphasizing the base ten nature of the number system, making it simpler for students and teachers to describe what they are doing by consistently referring back to the different colours. Set includes: - 100 x Yellow Cubes: 1cm x 1cm x 1cm - 50 x Green Rods: 10cm x 1cm x 1cm - 10 x Blue Flats - 1 x Red Block Age: 6 Years + What's in the box 100 x Yellow Cubes: 1cm x 1cm x 1cm 50 x Green Rods: 10cm x 1cm x 1cm 10 x Blue Flats 1 x Red Block