A unicycle is a bicycle with just one wheel.
It takes a lot of practice to learn how to ride a unicycle.
Unicycles usually do not have brakes!
Unicycles can also be used to do stunts.
Some people play basketball and other sports while riding unicycles!
There are many kinds of unicycles and some types are used mostly in circuses.
If you can ride a bicycle, do you think you can easily learn to ride a unicycle?