Each of us has good and bad childhood memories. When I was writing my essay on childhood, I picked one memorable moment from my early years. It was the day when my parents divorced. This day divided my life into two parts: before and after. I am sure you have many examples from your childhood as well when a certain situation shaped the course of your life.
If you need ideas, do not hesitate to search the internet for childhood essay examples. Moreover, there are many examples of written essays not only in English language, but also in Spanish and French. I am sure you will find a lot of ideas to support your writing.