Description: 【Construction】: Made from PP, this generator is built to withstand regular use in classroom settings, ensuring longevity and reliability during experiments 【Compact Size】: With dimensions of 80x90mm, this generator is compact and easy to handle, making it suitable for young students to use comfortably during their science activities 【Interactive Learning Experience】: By manually generating electricity through hand cranking, students gain a hands-on understanding of energy conversion processes, enhancing their learning experience in a fun and interactive way 【Educational Physics Kit】: This hand crank generator kit is designed for middle and elementary school students, providing a hands-on experience to exploce the principles of physics through engaging experiments 【Learning Tool】: Encourage curiosity and enhance problem-solving skills with this interactive science project that aligns with STEM education goals, fostering a love for science in children Specification: Material:PP   Size Chart: 8cmx9cm/3.15inchx3.54inch Package Includes: 1x DIY Hand Cranked Generator Kit   Note: 1.This is not infant toy , please take away from children to avoid eating. 2.Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.