Reliable quality: Precision manufactured metal axles in a smooth-edged ABS housing provide a durable STEM toy for project-based learning with an optimal safety profile for daily school use. Cognitive development: Modular components support spatial intelligence growth, enabling experimental learning and systematic skill building through creative construction and testing activities. Energy transformation: The toy demonstrates the process from manual force to electricity, illustrating basic principles of conductivity and electromagnetic induction. Multifunctional use: A practical tool for exploring the basics of power generation and lamp operation. The intuitive hand crank yields reliable energy conversion results in varied environments. Key attributes: metal axles, ABS housing, compact classroom-friendly design, safe for school settings, reliable performance. Use scenarios: - In-class lab: students assemble modular parts, crank the handle, and light a lamp while observing output to learn energy conversion. - Project-based learning: teams compare different configurations to evaluate efficiency and understand circuit principles. - Maker space or after-school: students test different speeds and loads to see effects on lamp brightness and power output.