How old are they?
They're two years old.
How old is she?
She's three years old.
How old is He?
He's six years old.
How old is He?
He's seven years old.
How old is He?
He's four years old.
How old are they?
They're five years old.
How old are they?
They're one year old.
How old is she?
She's five years old.