a six-year-old child的用法和样例：
- He was a shrimp of a boy, about six years old.
- They are children above six years old.
- She'd thought that was an awful lot of strokes for a six year old from a British rattan Junior school cane。
- The girl over there about six years old called him daddy.
- Last week my six year old, Pierson, came home with his front tooth missing.