Unicycle

A unicycle is a bicycle that has only one wheel. It's like a bike, but instead of two wheels, there's just one big round wheel. When people ride a unicycle, they have to balance very carefully so they don't fall off.

The rider has to sit on a seat that is attached to a post that is connected to the wheel. To ride the unicycle, the rider has to pedal with their feet so the wheel will move. When the unicycle moves, the rider has to lean and balance their body to keep the unicycle from falling over.

A unicycle is a special kind of bike that can be really challenging to ride. But with some practice, people can become really good at it and do all kinds of tricks like riding backwards, hopping, and even juggling while riding the unicycle!