I. . .can't really tell who's voicing the children, but I can sort of give a guess? :U
Inigo sounds sort of like Liam O'Brien. Kind of.
(Female) Morgan sounds like Michelle Ruff, from the one sigh I heard. xD
Owain kind of sounds like Male Voice 1.
I have absolutely no idea about the other kids, though.
Don't take my word for it though, as I'm horrible at identifying voice actors. u__u
Anywho, back to Awakening!