Bella and Brody Boerboom are nervous and excited to participate in today's Sanitarium Weet-Bix Kids TRYathlon.
It will be the second time the Frimley School siblings, aged 10 and 8 respectively, have donned their TRYathlon bibs.
"It's just fun," said Brody.
"Yeah," said Bella.
"It doesn't matter what place you come, the main thing is to have fun."