Don't go to any store, but let's say don't go into Bed, Bath & Beyond on a busy Friday evening, with your 4 and 6 year old if you might, possibly have those uncontrollable, silent, but deadly kind of farts. Even if you think you have the perfect scapegoat, the baby, with you. It won't work.
There is no fooling these bright, rather loud, nose plugging, kiddos. You will hear your 4 year old say, very honestly and loudly, "No Mom, the poop smell is coming from your butt." (who could blame her, really, her head happens to be in that vicinity) Her older sister will then say, quite loudly, "Yeah, Mom, you farted, it's not Bridget's poopie diaper" You will hear yourself saying, trying not to laugh, in your meanest whisper "You guys be quiet! Don't say anything more about it and mommy will buy you a treat at the end!"
Remind me to never have homemade chicken barley soup for lunch ever again.