Xiaoda's Montessori Cylinder Blocks for Early Childhood Education Effective Preschool Training Learning Toys 4piece Material is woodSingle size is 15.2x4x3.5cmWeight is 0.6kg/lotQuantity is 4 piece/lotMade in ChinaAge is > 3 yearsWaring is Small part not for childen under 3 yearsTo help develop the child's visual discrimination of size. Indirectly， to prepare the child for writing， through the handling of the cylinders by their knobs. Indirectly， to prepare the child for later work in Mathematics， through observation of the regular differences in the cylinders.Most suitable for home teaching of preschool kids， from 1 to 6 years.To help develop the child visual discrimination of size， volume， thickness and height. To develop eye and hand coordination and enhance fine motor skill.