Regular plural = singular + s    (regelmatig meervoud = enkelvoud + s)
A neighbour                 (1 person)
Neighbours                  (2 people or more)

to be:
He/she    is      a good     neighbour.
They       are    good        neighbours.
 
His/her (zijn/haar)
Brian Jones lives in 38 Queen Street. Florence Van de Velde lives in 36 Queen Street.
He is her neighbour. She is his neighbour. (Hij is haar buur. Zij is zijn buur.)

Them
Do you like your neighbours? Do you like them?           (Vind je hen leuk?)

Have a chat = talk informally                 (babbelen)
Child minding = take care of a child       (op een kind passen)