Answer:
I'm going to start by saying something you probably already know: third person uses the pronouns "he," "she," "his," "hers," etc. First person uses "I" and "me."
What you have to do is decide what the man is thinking and write it out in first person. You could ask yourself:
How does the man feel? Is he sad, angry, happy?
The man is addressing children. How should this differ from if he were addressing an adult?
How thoughtfully is the man speaking? Is he on an angry rant or trying to gently break bad news?
If you were in a situation like this, what would you be thinking?
