Gina - By family group do you mean each separate family? Members of the same family have the same family number, e.g. the first Child2 and Mother are in family 1, etc.
I've created a database with entries corresponding to different participants in a tasting experiment. All the entries are stored in a single table. The participants are each members of a family, with participants of a family given a family number (increments with family) (see image link below)...