This is how we do it:
(Just picture 2 little monkeys hanging on to the sides too)
There are some key phrases that are involved in one of these shopping experiences. They would be "Keep your hands off the cart", "Stay next to me please", and "We are not buying that today". Those are obviously coming from me. I hear "Wow! You sure do have your hands full!", "Oh twins!!" and "You are a busy mama!" multiple times during each outing. The attention doesn't bother me too much because I am proud of my kiddos. As long as I am not getting attention because a baby is crying or one of the girls is throwing a tantrum we are a-ok.
(As a sidenote: Boogie is in charge of remembering which baby sat in front last so they each get equal front time)