Features: This handmade fan set allows children to assemble a three speed fan themselves, making creativity and teaching basic physics concepts like circuit principles and aerodynamics in an engaging hands on experiment. Crafted from nontoxic wooden, this set features a three speed switching for adjustable wind speeds and includes all necessary components for safe, easy assembly as a durability wooden craft. Designed specifically for primary school students, this educational science set fosters innovation and practical skills, making it an ideal tool for youthful learners to develop problem solving abilities. Perfect for school science classes or technology workshops, this handmade fan set enhances classroom activities by providing a great application for understanding dynamics and wind formation in educational settings. After building, kids can testing the three speed settings to observe wind variations, reinforcing how different gears work and deepening their grasp of scientific principles through interactive play. Specifications: Component: Wood Color: As pictures shown. Size: approx. 9x10x10cm/3.54x3.94x3.94in Package Includes: 1 set science experiment materials set note: Please allow 1-3cm error due to manual measurement. please make sure you not mind before you bid. Due to the differences between different monitors, the picture may not reflect the item actual color.