I just had this conversation while vacuuming my bedroom floor.
Eadie: Mum, what are you doing?
Me: *sarcasm* I'm shopping, Eadie.
Me: *pause* .. yes. Shopping
Eadie: You're shopping?
Me: *now secretly rolling my eyes* No Eadie, I'm vacuuming.
Eadie: Your shopping and vacuuming?
Me: No, just vacuuming.
Eadie: *still confused* You mean vacuum shopping?
Me: *trying not to LOL* No, I'm just vacuuming, not shopping.
Eadie: Then why did you say you were shopping?
Me: I was... I.. ugh. Never mind babe. I was just being silly.
Eadie: *shakes her head as she walks out of the room*
*Note to self: Sarcasm to a three year old only results in you feeling like the idiot :)