Little Sarah Throns used to have trouble keeping up with her six sisters and two brothers as they tore around the family home on bicycles.
Born with a condition that gave her club feet and little leg strength, the eight-year-old struggles to turn the pedals of a bicycle.
But thanks to a team of volunteers, Sarah now has a hand-powered tricycle and can keep pace with her siblings.
Her sturdy trike is made of parts from old Rottnest Island hire bikes custom-converted to fit her tiny frame.
Sarah plans to take her new wheels to a BMX track to race her dad and two of her siblings, who are all previous State champions.
"I'm looking forward to that one," dad Paul Throns said.
"Sarah wants to do everything.
"She doesn't believe anything will stop her from doing what her brothers and sisters can do."
Sarah's trike was the brainchild of Bruno Booth, from Dismantle, a community-based bike recycling and maintenance group, whose dad built him a similar machine when he was a boy.
Ten hand-pedalled trikes were put together for children at Rocky Bay by Dismantle and the Dreamfit Foundation, a group that helps people with disabilities.
Funding for the project came from Variety WA.
Sarah chose the bright colours and helped assemble the trike at a workshop at Rocky Bay last month.