hand powered fan

This is a fun and educational project designed to help kids understand how sprue gears work. It’s a hands-on way to explore basic mechanical movement and gear interaction.Please be careful when assembling the printed threaded parts. Screw them in gently, using a slight back-and-forth twisting motion. This allows the threads to clean and seat themselves properly. Do not force the parts together.The gears may feel stiff at first — this is normal. After a short period of use, they will wear in naturally and begin to rotate more smoothly.