The exact spacing and making the age of the children sequential have been great tips.

Let me make sure I understand one thing:
husband 53, wife 45, son 22, son 18, daughter 17, son 8
would this be ok, mixing the son/daughteers like that?

husband 53, wife 45, son 22, son 18, son 8, daughter 17
Then would this be incorrect, to give sons first, then daughters?

I think from what you said the first one is the right one, but I just want to be 100% sure. Thanks again guys! keep 'em coming!