I very often get the "How do you do it?", "Are they all yours?", "You have your hands full!" or even the dreaded "OMG!" when we go out. I know those trite comments frustrate and annoy many parents of larger families. They wear on me, too! But instead of snapping back with a sarcastic answer (like I want to do), I use the exclamation to give glory to the Lord and perhaps get a chance to share the Gospel. I also try to remember to smile when we are out, so as to not make my children look burdensome.
Taking the Lord's name in vain seems pretty common in my area, and it bothers me the most. I don't speak like that to my children, and hate that others do! So now I answer that exclamation with a praise: "Isn't He wonderful! Look how He has blessed our family!" After they pick up their jaw, the other person is in a better place to ask intelligent questions and have a good conversation. They are often a bit embarrassed at their mis-use of the Lord's name, as well.
"Are they all yours?" invites "Yes, thankfully, they are! Aren't I blessed?" I babysit a couple of kids, so if they are with us, I say "I babysit these two, but the others are mine. Aren't I blessed?"
"How do you do it?" is usually answered with "By God's grace!" and "You have your hands full!" gets answered with " No, the Lord doesn't give us more blessings than we can handle! I hope to have more Blessings someday!"
Only once I was asked "If I knew what causes that?". I was taken aback, but answered, "The blessing of God". Having practiced giving a positive answer to the common reaction of seeing our family, I was able to not lose my witness when asked a particularly rude question. I have been able to share the gospel many times with folks who are intrigued by our family. I may not be able to be a missionary to Africa or China, but I can share the gospel with those in need of the Savior here in my little town!
Call it 'Habit Training' for Momma!