Mrs. Bee is Korean. I am half Japanese, half German/Irish.
So Charlie is 1/2 Korean, 1/4 Japanese, and 1/4 German/Irish. Phew, what a mouthful! I guess you could simplify it, and just say he is 3/4 Asian?
I wonder how he will explain his ethnic breakdown to others when he gets older? Anyway how about your LO: would love to hear about everyone's ethnic breakdown!