Wheels are round objects that help vehicles move smoothly. They are usually made of rubber and metal, allowing cars, bicycles, and buses to roll along roads. The invention of the wheel was a significant milestone in human history, making transportation easier and faster. Wheels work by rotating around a central axle, which helps reduce friction with the ground. This simple yet effective design is found in many everyday items, from shopping carts to roller skates. Without wheels, our world would be much less mobile, making travel and transport much more challenging.