Mathscraft is a fun event for high school students, which aims to give them a taste of what 'real' maths is like. They are led through finding ways to solve problems by spotting patterns, making conjectures, and convincing themselves and others. They'll also have the opportunity to meet and work with research mathematicians.
This event is free, with morning tea provided. It's aimed at year 7-10 students with any level of interest in maths.