Easy Assemble & Disassemble: Our Electric Motor DIY Kits is designed for easy assembly and disassembly, making it a great hands on learn tool for electronic enthusiasts and DIY beginners. Educational STEM Project: This DIY DC Motor Model kits is a STEM project that provides a practical, in depth understand of how motors work, making science more engaging and fun. Intuitive Learning: With this motor model, students can easily grasp the main structure of the motor, making it a highly effective educational toy for cultivating interest in physics. Troubleshooting Guide: If the kits isn't working after assembly, check the Armature Coil and Electric Brushes. If they have poor contact, a simple adjustment will fix the issue. Ideal for School Science Projects: Our DIY Motor Kits is a back to school item, great for science projects and physics teaching. Size Chart: 14cmx9cmx10cm/5.51inchx3.54inchx3.94inch Package Includes: 1Electric Motor Science Assemble Kits Note: 1.This is not infant toy , please take away from children to avoid eating. 2.Please allow slightly errors 1-2cm differences due to manual measurement.