The best thing about grandparents: They fall for anything.
Check this out: every time I fart, Granny checks my diaper for poop. Every time. No exceptions. If she's holding me and she hears something, especially a ffffft or a bloop, she'll lift up the side of my diaper and check.
Which brings me to this, and I don't really have the heart to tell her face to face: sometimes, my farts, they ain't real. I'm faking. I have that ability. I just want to see if she still looks.
Don't tell anyone that I do this.