Huntley School was not only one of the smallest schools to enter, its students were also younger and a lot less experienced than their secondary school competitors, Ms Wheeler said.
"But these boys are all very good and young to be such skilled improvisers."
Cornet player Henry Sherris, 11, said he's been playing the cornet for about two years.
"Yes, I enjoy it very much and I'm so pleased we did well."
Henry said he was keen on pursuing a career in music when he leaves school and also studying sound engineering.
One of the most exciting parts of the weekend was going along to some of the master classes on Saturday at the School of Music campus at Massey University.
"That was so amazing for us."
Ms Wheeler said it was wonderful to watch her students throughout the master classes.
"They sat there and soaked it up, they just loved it."