CCCUUUU~TTTEEEE!!! I love the way you did the boy's face, I would move his neck a little more toward the front, but the ear and jawline look really good.
The noses... are so pointy. The girl's eye should be higher, and the guy's neck should be out a bit more and a little shorter. And uh, I'm pretty sure (on the guy) ears aren't that high.