There was pandemonium when the yellow and blue Wiggles came into the school hall during breakfast club, surprising the students.

Principal Cathie McMaster said upon spotting Ms Watkins, a kindergarten girl "burst into tears because it was all too much for her".

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It is Ms Watkins' second visit to the school in five months and once again, she co-led a class with music teacher and ARIA Awards nominee Julia Rennick.

Ms Rennick said they "hit it off" and Ms Watkins stayed in touch after the ARIA Awards, saying she would like to do some filming this year with her this year.

"[Emma] was interested in music education and the power of it, so they suggested they come up and film with the children in Gunnedah Public School and promote music education," Ms Rennick said.

"We taught a lesson, did a bit of interviewing, a little bit of dancing - I think I messed up my Scottish fling - and we sang some Scottish songs.

"It was a really fun experience and lovely for Gunnedah Public."

Ms Watkins and Mr Field were also joined by Wiggles musician Oliver Brian, and male ballet dancer Callum Henry-Hodgson.

Ms Rennick said it was wonderful for the children to see "some of their heroes from when they were a bit younger" and guitars, banjos and bagpipes being played.

She said Mr Henry-Hodgson was a "fantastic example" that ballet "is not just for girls".

"I was in very good company today," she said.

Year 1 students Nicola Sawyer and Zeke Kay were part of the Wiggles fun and said they had a good time.

Zeke is a big fan and watches the TV show, while Nicole said "I like seeing them in real life".

Nicola enjoyed learning ballet moves and Zeke liked hearing Anthony play the banjo.

One funny thing they remember was when "Anthony fell asleep at the end and we woke him up".

Ms McMaster said it was hard to keep the exciting news under wraps but it was worth it to see the kids' faces when Ms Watkins took a walk around the school.

"It's like a cartoon character has come to life," she said.

"The kids have had so much fun and were so engaged in what they were doing."

Ms McMaster said Ms Watkins was "personable" and "obviously, loves what she does, which comes out out so clearly in her persona".

Year 1 teacher Heather Lidwinski said they were "so lucky" and the kids were "mesmerised".

"It's happened because we have got the best music teacher in the world. She deserves it. She works hard and every week she shows her passion," she said.

As for Ms Rennick, she says, "you never know where life will take you".