Millennium Kids was founded by four twelve-year-olds in 1996.
A small group of Western Australian students attended the United Nations âÂÂLeave It To Usâ environmental conference for children in the United Kingdom (UK). Following their attendance at the conference, the group developed an environmental conference titled 'Kids Helping Kids', with support of Perth Zoo, Department of Environment, Clean Up Australia, CALM and the City of South Perth. Following this, they founded Millennium Kids.
In 2000, they presented a series of "environmental challenges" to Environment Minister Cheryl Edwardes, who tabled them at Parliament.
In 2012, the Western Australia Headquarters was based in the Old Fremantle Prison. The group works with schools to arrange environmental and sustainability education, connecting pupils and teachers with local community groups.
In 2014, the group organised projects to clean up the Swan River.
Millennium Kids is a registered charity with affiliates in Canada and South Africa. The organization is run by children aged 10-25 years old and is supported by educators, mentors, and sponsors. In 2014 the president was Rachael Cochrain.
Millennium Kids is directed by a Youth Board, with fifteen members aged between 10 and 25 years. It is supported by the United Nations Environment Program Agenda 21.
In Canada, as a not-for-profit organisation, Millennium Kids facilitates many environmental activities across Ontario (from Ottawa, Toronto, to Kitchener-Waterloo). A youth board is present in Ottawa and Kitchener-Waterloo, A chapter was established in Toronto in 2006. The youth board decides on what initiatives will be taken upon the year. Among the activities, the Car Free Festival are planned as initiatives in cooperation with other environmental/youth empowerment organisations that reside in the respective area of the initiative.