This is the Pink Tower, a representative sensorial material in Montessori education. It consists of 10 cubes, with sides ranging from 1cm to 10cm, increasing by 1cm each time. This material helps children visually learn about three-dimensional changes in length, width, and height. Features: Children observe the material, handle it, and grasp the changes in three-dimensional size. They experience the concept of "big" and "small" before numerical values are introduced. (This leads to an understanding of the decimal system in math education.) ● Age: Around 2.5 years old ● Dimensions: Pink Tower: 1 x 1 x 1cm to 10 x 10 x 10cm ※The first photo shows the item in use, and the item for sale is the new one in the second photo!