"The children all really enjoyed it," Sarah said.
"It's been so great for the children to see the postcards from all the different schools," Te Ra principal Andrea Sorger said.
"It's such a great little project that brings the world here for the children."
The postcard mural was created in time for Te Ra's Harvest Fair last week and will be on display throughout the year as the school runs various events celebrating 100 years.
With postcards coming from all around the world it has been an eye-opening learning experience for the students.
"They can see they are actually so connected throughout the world with all these other children," Andrea said.
"The schools are all different but there's some things that are similar they can connect on.
"It's been great for the children as it's a visual display, it makes it real for the children and illustrates what it actually means having all the schools come together from around the world."
The first Waldorf school in New Zealand opened in the 1950s in Hastings with Te Ra opening in Paekākāriki in 1996, moving to Raumati South a few years later.
"We integrate the academic subject with lessons that are themed around stories, history and geography.
"We have an artistic element in everything.
"Our children learn how to draw and paint and they all learn things like handwork, languages and woodwork.
"It's a very broad curriculum but it's all based around looking how children learn and develop at different stages and we try to give them a learning experience that matches that."