Childhood is best stage in person's life. Do you agree ?

Many people will probably agree the childhood is the best time of one's life. But not every childhood is happy. Some children may be born in a poor family or under such circumstances that make their lives bad. In my opinion, childhood is the happiest time of a person's life in most cases.
Why is childhood the best stage of one's life? Let's consider common circumstances. The child is born in good family, he or she has parents who love and take care of him or her. The kid can go to school, learn read and write and play with friends and schoolmates. The child is not worried about an adult's problems like to have everything ready for work, pay bills, survive till next month etc. Kids don't pay attention to problems like policy, global warming, high criminality or problems of the third world. They don’t have to. They worry about a new shovel to sandbox, or about going to playground. They can live carefree, that makes childhood best stage in their lives.
Let's consider different circumstances. A person is born in poor family, can't go to school, can't learn how to read and write, can't experience new things or can't play with other kids. Or a child has parents who abuse him or her. Such childhood is a nightmare of one's life.
In conclusion, childhood is the happiest time of a person's life in most cases. It depends on circumstances and the number of bad childhood is not small either. One can't chose where he or she will be born.