"I couldn't believe her. It was so weird. I even got some money."
The young girl in his winning drawing was "a random", he said. "She was just in a book I saw."
Mohi has interests in science as well as art.
He was selected to be part of a scientific Massey University research project this week.
"I like science a lot. It's always interesting and our teacher is awesome."
So art really wasn't a main interest for him, he said. "I just love to draw and some of my brothers and sisters do too, so it's kind of in the family. It's better than TV anyway."
The family live at Waiouru, where Mohi's dad was in the army but now works in his own building business.
"We live in the countryside where it's always quiet and peaceful. I really wouldn't want to live in town. Coming in by bus every day to school is enough for me."