Students from Malvern Springs Primary School each wrote personal messages of hope and thanks to the soldiers, who fought and died on the beaches of Gallipoli.
Their crosses featured in the Gallipoli Run last weekend, where participants carried them from Ellenbrook and placed them in a giant cross formation in King's Park.
The special tribute will remain there until Friday when they will placed next to memorial plaques ahead of the King's Park centenary Anzac service, which is expected to attract a record crowd of 100,000 people.
The crosses will then make their way to Europe for displays in war cemeteries in France andBelgium.
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Malvern Springs PS will hold its Anzac assembly on Friday.
School deputy principal Penny Reynolds will attend the Anzac Day service in Gallipoli this year.