The first season of Australia's Brainiest Kid was produced in May 2004, airing on the Seven Network on Sundays, starting 28 November 2004.

A second season was produced in 2005, and was broadcast on Network Ten at 6:30 pm on Sundays, starting 25 September 2005.

It was hosted by Ten News newsreader Sandra Sully[2] and co-hosted by Samuel Shaed.

The winner of the first series final, Aaron Chong, won the title of "Australia's Brainiest Kid" and A$20,000 to be held in trust until he turns 18.

12,000 children sat the online test for the second season of Australia's Brainiest Kid, aired on Network Ten.

All contestants received a Mathemagic computer tutor from the Australian Institute of Mathematics as a "participation" prize.

The winner of the second series final, William Xi, won the title of "Australia's Brainiest Kid" and a trust fund worth A$20,000 that he cannot touch before his 18th birthday.

Commentators noted that children of Asian descent dominated the preliminary televised rounds during this series.

The Chaser's War on Everything parodied the series with an advertisement for "Australia's Brainiest Non-Asian Kid," in which a Caucasian contestant is unable to answer "What's two plus three?"

The parody ended with promos for dozens of supposed upcoming Australia's Brainiest episodes featuring numerous animals, inanimate objects, and three subliminal messages.

This episode of Australia's Brainiest was given the television rating of PG, for mild coarse language.

Contestants Australia's Brainiest Quiz Master aired on 19 February 2006, and featured winners from Nine Network's Who Wants to Be a Millionaire?, Sale of the Century and Temptation.