Who is he?
He is a DAD.
They are ... (in one word).
PARENTS
Who is he?
He is a GRANDPA or GRANDFATHER.
Who are they?
They are a FAMILY.
They are ...
CHILDREN or BROTHER and SISTER
The brother of your mum or your dad is your...
UNCLE
Who are they?
They are GRANDPARENTS.
Who is she?
She is a MUM or MOTHER.
He is her...
BROTHER
She is his little...
SISTER
Who is she?
She is a GRANDMA or GRANDMOTHER.
MUM and DAD are your...
PARENTS
The sister of your mum or your dad is your...
AUNT