Montessori Knobbed Cylinder Socket Material: Beech Applicable: Suitable for more than 3 years old Size: 15x4x3.5cm/pc Natural wood and wood color, the wood material protects your child's safety and health. Through observation, logical reasoning, analysis and other forms of thinking, help children learn to reason, draw conclusions. This Montessori material can be used as teaching tools in school, homeschool, or early childhood development. Training kid's visual discrimination of high and low, big and small. Large wooden knobs for easy grasping. A great toy for enhancing fine motor skills, spacial reasoning,and hand coordination,dexterity for young children boys and girl as they grab the peg and match. Exercise children's finger skills.