CALLED to imagine a world free from bullying, Gayndah was flooded with a sea of orange on Friday as both Gayndah State School and St Joseph's Catholic Primary School dressed up to show their true colours.

Gayndah's schools were just two of 4575 across Australia that registered to participate in the eighth National Day of Action against Bullying and Violence (NDA).

The day calls for schools to unite against bullying and violence in the classrooms and beyond.

Gayndah State School put it's foot down by marching through Gayndah's main street after the school's Friday morning parade; balloons and posters in tow.

Principal Andrew Goldie said the school focused on encouraging kids to be kind to one another as well as resilient.

"Rather than just focusing on bullying we wanted our students to celebrate a positive message of kindness and support,” he said.

"Friday was great, all the kids were intrigued by the cause and they loved creating posters and writing nice notes to one another.”

Registering with the NDA gave the schools a range of downloadable materials, lesson plans, classroom discussion starters and activities to educate the children on Friday and continue the discussion throughout the year.

In conjunction with their Crazy Hair Day for Caritas Australia, St Joseph's Catholic Primary School showed their support for the NDA by dressing in orange clothes.

Rebecca O'connor, Assistant Principal in Religious Education, said wearing orange provides a powerful, visually compelling expression of solidarity.

"When hundreds of individuals in a school or organisation wear orange the vibrant statement becomes a conversation starter; sending the unified message to our students that bullying is not okay,” she said.

Every state school in Queensland participated in the NDA with more than 323,000 students in the state uniting against bullying.