Apparently it’s not that Scott portrays God as a child, but the child is the concrete manifestation/mouthpiece of God. Early on in Scripture, angels carrying God’s messages were portrayed as youths. Movies being what they are, viewers need a more believable “voice of God” than words emanating from a burning bush. I appreciate the problem, as I’ve not found any media depiction of God’s voice a satisfactory & believable form.
Especially since we don't know what His voice sounds like.
Reminds me of a story:
A 1st grade teacher had the students drawing pictures as part of the day's sessions. Little Johnny was intently drawing, nose close to the paper and tongue darting at the corner of his mouth. He was so intent and focused that the teacher went over to see what he was drawing. She couldn't tell for sure, so she asked, "Johnny, what are you drawing?" He replied, "I'm drawing a picture of God." She thought for a second and said, "Johnny, nobody knows what God looks like." He responded, "That's because I haven't finished the picture yet."