Description: 【2 Types Different Geometric Shapes】12 Pieces Pull string Geometric Solids: demonstrates geometric solidss (such as triangle, square, polygon, and solid shape) through pull string mechanisms for hands on learning. 12 Pieces Perspective Geometric Solids: Intuitive learning through 3D Shapes for Teaching. Understand geometric shapes. Understand the relationship between points, lines, and surfaces. Learning to calculate the area and volume 【Learning Math Spatial Geometry Scientifically and Efficiently】3D Shapes for Teaching, a great way to learn math geometry from the ground up, and makes a great school supply or teacher supply 【Early Math Manipulative and Geometry Set for Kids】Encourages exploration with movable parts to study pattern changes, improving creativity and mathematical expression 【Quality Sensory Puzzle Toys】Lightweight yet sturdy paper construction ensures secure handling and repeated classroom use 【Complete Set of 24 Shape Puzzles】Includes 24 transformable Teacher Aids in a compact package, suitable for individual, group activities, back to school supplies Specification: material: paper and plastic Size Chart: Package size 24cmx19cmx12cm/9.45inchx7.48inchx4.72inch Package Includes: 12 Pull String Geometric Shapes 12 Perspective Geometric Shapes Note: 1.This is not infant toy , please take away from children to avoid eating. 2.Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.