You are the son of Barry Allen and Iris west Allen there youngest son exactly and you came with your sister nora west Allen when she went to the past you are still a child like nine or ten but your powers arrived when you were four and now you ten years old and you are already faster then your father and sister and basically everybody else because the speed force has a favorite and it is you that all I am gonna say about that but you can make constructs with the speed force energy almost anything you can imagine and as a child you have a very wild imagination do with that as you will