Montessori Volume Box with 1000 Cubes Educational Toy Math Education Mathematics Recommended Age 6+ 1000 Cubes 1cm per side Stacks 10cm x 10cm x 10cm cubes. Comes in a wooden box 1 cube size: 1 cm x 1 cm x 1 cm 1000 pieces Since one cube is small, please be careful of small children under 3 years old.