Colorful lesson model designed for handson classroom use. Simple enough for elementary students while remaining comprehensive for middle school lessons. Built for practical teaching and repeated handling. Key benefits Clear, approachable design that helps students visualize concepts and follow guided activities. Durable construction made of tough non toxic PVC plastic for years of active research and classroom use. Compact and portable size at approximately 17.3 x 8.8 x 15 cm, or 6.8 x 3.46 x 5.9 inches, suitable for individual or small group work. Designed to support a range of lesson plans and learning levels, helping to improve engagement and understanding. Low maintenance and easy to clean, suitable for frequent classroom use. Function and compatibility Intended as an educational lesson model for elementary through middle school topics. Works well with classroom demonstrations, lab activities, and study sessions. Suitable for schoolchildren or students aged 1421 to improve conversion rates. Compatible with typical classroom materials and lesson formats that require a physical model for explanation and practice. Practical use scenarios Classroom demonstration: Use the model during teacherled lessons to show structure and process clearly to the whole class. Small group practice: Students can handle the model directly during lab activities or group assignments to reinforce handson learning. Revision and assessment prep: Use the model for individual review sessions or formative assessments to help students translate theory into practical understanding. Materials and performance Construction material: non toxic PVC plastic for strength and durability. Performance: Withstands frequent handling and active educational use while maintaining shape and color. This model provides a practical, durable tool for handson learning across multiple grade levels without added complexity.