no inner envelopes..anyone?

I got my invitations online at lizard designs.com
I love the proof but I have a question:
The invitation is kind of different than average and there is no inner envelope
I know the inner can be used to specify who exactly is invited..
So do I adress the outside Mr So-&so and guest?
For people with a child do I put the child's name on the outside? How do I word that? eg
Mr. & Mr. Mike Brady
Greg Brady?
or
Mike, Carol & Greg Brady?

Thanks
Cheryl

We didn't have inner envelopeseither. I used:
Mr. Mike Brady and guest

If the 'child' was over 18, they got their own invite. Otherwise:
The Brady Family

But using two lines works too:
Mr. & Mrs. Mike Brady
Mr. Greg Brady

Thanks Lisa
I think I'll do the same way as you and use 'The Brady Family'
I don't know why couldn't think of that!
I have to email my guest list tommorow and I'm feeling a little stressed!