My little sister was adopted, and she was told by our oldest sister that she was adopted when we were all in Japan the summer after 3rd grade. So I was almost 9 and she must've been almost 6.

I remember being so surprised that I had never considered that she was adopted. My little sister is actually biologically Korean, and the rest of us were half-Japanese. Somehow I never noticed... I guess it never occurred to me that someone might be adopted. It was a foreign concept to me.

In any case, I think that finding out from someone besides our parents was not a great situation.

If someone in your family was adopted, when were they told?