So, I don't know about "happy," but this did make me laugh:
(Background: I am half-Asian on my mom's side]
Last night, our daughter grabbed a round straw placemat that we had on the dining table and put it on her head so that it vaguely resembled a conical coolie hat, like you see in the rice paddies. She said to me, "Hey Daddy, I look like I'm from [grandmother]'s country!"
So yeah, my four year old made a racial stereotype joke. About her grandmother.