If Amber Yoon's reaction was anything to go by, this year's Swisse Color Run is on track to keep its status as the world's happiest fun run.
The five-year-old was having a ball, testing the coloured powder that will fill the skies over Langley Park on Sunday.
Participants are bombarded with colours over the 5km course.
Amber's mother Belinda said the donation of this year's proceeds to the Princess Margaret Hospital Foundation made the run a special occasion for the family. "We've been involved with the foundation since Amber was born - she's a little bit of a miracle," she said.
"When Amber was born she was unable to swallow, she had heart problems and no vestibular system, but she's somehow overcome that."See http://thecolorrun.com/australia/perth for more information.