Thousands of students across Australia walked out of their classrooms on Friday to call for stronger action on climate change.

At the more than 110 events across the country, participants made their thoughts known on placards big and small.

Some students took a lighter take on the climate crisis.

Stefan Armbruster

Getty

Massively proud to stand with a huge diverse crowd of schools, groups, organisations ... or in other words, our community here in Hobart. #ClimateStrike # pic.twitter.com/9SHvO9YiG6 — Jane Longhurst (@janelonghurst) September 20, 2019

While others had a far more serious message for Australia's grown-ups.

Abbie O'Brien

Abbie O'Brien

Abbie O'Brien

Adults also joined in at many of the events.

Abbie O'Brien

Abbie O'Brien

Lots of babies at this protest. They don’t even have jobs! #ClimateStrike pic.twitter.com/q3J3MwFYPz — Alex Lee (@alex_c_lee) September 20, 2019

Some very young Australians also went along.

Abbie O'Brien

Abbie O'Brien

And humans weren't the only ones to attend.