Twelve-year-old Jessy Edenborough was diagnosed with autism in 2015, but on top of that is also living with attention-deficit/hyperactivity disorder (ADHD), oppositional defiant disorder (ODD), obsessive-compulsive disorder (OCD), anxiety and mental delay.

School has been challenging, but the experience was made worse by bullying that, at one point, prompted Jessy to cut off her hair, which had been called "stupid".

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Her mother, Fiona Broadbent, was proud that her daughter was able to make it through and wanted to celebrate the achievement.

"When COVID hit, it did make it a bit challenging between home schooling, work life and trying to organise the transition to high school on top of everything, it was a really challenging time, but at the end of the day we look back and go 'We made it'," she said.

"To say we've only got four days of school left is an achievement itself."

Knowing how big of a Holden supporter Jessy is, she posted a message in the Bathurst Our Town Facebook group to see if anyone with a nice looking Holden would be willing to drive Jessy and her friend, Iesia, to their Year 6 prom.

Mrs Broadbent said there was an overwhelming response, with one person, Chris McKeig, offering to arrange a convoy of Holdens.

The convoy ultimately featured seven cars, driven by Mr McKeig, Peter Donnelly, Darren Gold, Donna and Todd, Shane Carpenter, Les Ovington and Rob Farmsworth, who was from Lithgow.

Tania and Andrew Livingston also helped with the surprise.

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There were six commodores in the convoy and one Torana.

Jessy was surprised to see the convoy parked outside her grandmother's house, where she getting ready, and became a little overwhelmed when she realised they were there for her.

"She almost had a tear in her eye, that's how it was for her. It was amazing," Mrs Broadbent said.

Jessy and Iesia chose to ride in the candy green Holden, Mr Ovington's car.

The convoy did a lap of Mount Panorama first before taking the girls to Bathurst RSL Club for their prom.

All eyes were on them when they arrived.

"It made her feel like a lot of people were almost jealous and she had the best night of her life there at the Year 6 farewell," Mrs Broadbent said.

She thanked everyone who was involved with the convoy and said she plans to repay them with a lunch in McPhillamy Park.