Many kids do not wait until they are adults to start working. Some kids work to learn more about things that interest them.
Some kids work to help their families earn income. Other kids work to make their own money to buy things. Some kids volunteer, or work for free. They do it to support a cause that is important to them or to help others. And some kids even invent new products because they want to help others.
All these kids are growing their human capital. They are learning valuable skills. They are gaining knowledge that will give them more opportunities in the future, as adults. Read about kids at work around the world. Do any jobs look interesting to you?