Opinions, experiences requested

I'm struggling a bit with how much information is appropriate to present to Adam at this time about his birth family/adoption, etc. Right now, what he knows is that he was born in Vietnam and that I took a plane to go and get him and bring him home. Recently, I added to his knowledge the fact that he has family in Vietnam and that we can visit them someday when he is older if he likes. But I haven't been very explicit about who this family is. So, I'm wondering -- is this enough information for him at his age? I have pictures I could show him. Should I tell him these are his parents and siblings? (Not to take anything away from his rather large extended imaginary family, which includes his "other mother", his child, his brothers, his husband (LOL)and his sisters -- who are the only ones who seem to have names -- Caneena Ootz and Caneena Aatz).

Is this too much information right now? I know the right thing to do -- its the timing and the details that are hard.

Wise words

When I despair, I remember that all through history the way of truth and love has always won. There have been tyrants and murderers and for a time they seem invincible but in the end, they always fall-- think of it, always.

-- Mahatma Gandhi