Drawing triceratops like a 40 year old

My 4-year-old son’s drawings are improving. Here is a triceratops. 

He probably looks forward to the day that he can draw even better. But I don’t think he should rush it. Things only go forward. Only 4 year olds can draw like 4 year olds. A 40 year old couldn’t draw like a 4 year old if she tried—at least, not as well as a 4 year old. 

How old are you? Appreciate that and draw like the age that you are.