Q&A: Invitations: Not Using Inner Envelopes?
Our wedding invitations do not have an inner envelope. How should I address an invite to a large family without using "and family"?
Put the parents' names on one line and the kids' names underneath, like this:
Mr. and Mrs. Robert Sullivan
[or Robert and Sandra Sullivan]
Brandon, Jennifer, and Kyle
12345 First Street
Anywhere, USA 98765
If you need two lines for the children's first names, that's fine. Keep in mind that children over the age of 18 should get separate invites, whether they live with their parents or not.