Xin store Montessori Materials Wood Math Blocks Shape Sorter Number and Stacking Learning Toys Material: Wood+ plastic Size: 44 x 14 x 1.5cm/17.32 x 5.51 x 0.59 inch This toy contains small parts, so it is not suitable for children under 3 years. This toy aims at teaching the concepts of color and number, promoting eye and hand coordination. It can be used as teaching tools for home schooling or early childhood development.