A man visits a friend who has three children.
The mans asks: "How old are your children?"
The friend replies: " The product of their ages is equal to 72 and their sum is equal to the number on the house accross the street."
The man thinks and says:" You have certainly forgot to mention another fact."
"Yes," says the friend, "my eldest plays football."
"Thank you", replies the man, " I have the answer."
Question: How old are the children?