The children's children (i.e. grandchildren, great-grandchildren, and so on) can usually only inherit something if their parents have already died or have themselves waived the inheritance.
Les enfants des enfants, c'est?à?dire les petits-enfants, arrière-petits-enfants, etc., ne peuvent normalement hériter que si leurs parents sont déjà décédés ou renoncent à l’héritage.