who farted?

in the afternoons i teach slightly older kids. around 4-8 years old. the kids in the mornings spend at least 5 hours in an english-speaking-only environment so their english level tends to be a bit higher.
most of the time when i'm talking to the afternoon kids, they have no idea what i'm saying.
well one day i'm teaching them computers. it's in a really small, enclosed space and someone cracked one. the smell was pretty bad.
"who farted?" i asked, not expecting to get an answer.
"i did!" piped up a cute little 4 year old girl. she hasn't been studying english for very long and often gives incorrect responses to questions because she thinks that's the way you're supposed to answer. so i ignored her, thinking that this was the case.
"who farted?" i asked again.
"*i* did." she insisted.
so i decided to humor her.
"you farted?" i asked.
"i farted." she said with a definite nod of the head.
even though i'm not supposed to use japanese, i leaned in and asked her if she farted in japanese. she nodded her head.
very well. carry on then.