Grand children portrait (opinions please)

Shot this with my NEX6 + Zeiss 24mm and bounced flash. PP with Photoshop CS6, some (minor) noise reduction and Silver Efex for BW conversion. Also had to do some dodging to make the background a little less dark in lightroom. Wanted to get somewhat high key look. What do you think? We are thinking about printing this on a large canvas as a present for my parents-in-law (some of these kids are mine, some of my wife's sister and brother).