SHENSENCHAO Pulling string 3D geometry learning book with woven rope design toy teaching roll and surface area formula, DIY solid geometry model book, cultivating mathematical thinking (15 models)

Core innovation: With a momentary pull, the plane becomes solid. This book completely subverts the static mode of traditional geometry learning. Through the unique "string pulling" mechanical structure, readers only need to gently pull the string next to the page, and two-dimensional flat shapes (such as triangles, circles, polygons) immediately "jump up" from the page, transforming into precise three-dimensional models (such as cones, cylinders, pyramids, prisms). This magical transformation process makes abstract geometric concepts intuitive and perceptible at the fingertips.

Exquisite design and durable quality: a combination of art and science. Using thick cardboard and tough and durable drawstring wire, it ensures smooth deformation and resistance to damage even after repeated operations. The model design combines mathematical accuracy with visual aesthetics, with clear color differentiation of different geometric elements. When placed on a desktop, it is also a beautiful science popularization artwork, encouraging children to continue exploring and showcasing.

This string model book introduces geometric shapes in an engaging way, helping children grasp the relationships between points, lines, and planes. It helps to understand the formulas for volume and surface area, and promotes spatial and mathematical thinking through interactive games.

This set includes various geometric solids such as cubes, cubes, cones, etc. Provide three versions with 15 shapes, providing comprehensive coverage for area and volume calculations.

Using a perforated guide design, children can easily follow the steps to complete each model. This ensures a smooth learning process, allowing children to successfully demonstrate their understanding of geometric principles through hands-on activities. Safety and user experience are given priority, ensuring that children can enjoy learning without any risks.