Durable construction Specially shaped ABS components with metal-reinforced joints and burr-free surfaces enable safe, kid-friendly handling during experiments and group activities in class. Practical learning Engaging, hands-on assembly with a well designed plug-in system trains problem-solving skills and supports realistic skill development through project work. Manual energy visualization The hand crank demonstrates magnetic field operation, making energy conversion visible and promoting practical understanding of electromechanical principles. Versatile applications Provides even energy delivery for lighting experiments and eco-research projects. The robust hand-crank mechanism supports hands-on testing in different use cases. Use scenarios - In physics lessons, demonstrate energy conversion and electromagnetism using the crank. - In eco-projects or science clubs, power small lighting or sensor experiments with steady output. - In group workshops, teach assembly, troubleshooting, and collaborative problem solving through hands-on testing.