Curtin University is located in South-east Perth in Western Australia. The nearest international schools (geographically) that cater for boys aged 6 are Wesley College (co-ed junior school), Rehoboth Christian College (co-ed), Ursula Frayne Catholic College (co-ed) and Riverside Community School (co-ed).
This link will provide you with a list of all the schools in Central Perth that cater for international students:
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This link will provide you with a list of all the schools in Perth South that cater for international students:
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Or, the link below displays every non-government international school in Australia on a map and allows you to easily search for schools within a desired readius of Perth or any other specific location.