Cory’s Family Fun Day Out supports the Royal Children’s Hospital as part of Cory Panozzo’s final wish.

Cory, 18, has neurofibromatosis type 1, or NF-1, a disease that causes tumours along the nervous system.

It can cause mobility issues, debilitating pain and organ malfunction and does not have a cure.

The Horsham teenager’s final wish is to raise money for the Royal Children’s Hospital Good Friday Appeal.

This inspired former colleague and friend Gemma Chaplin to create the fun day.

She said the event was at Horsham’s May Park from 11am to 4pm.

Gemma said the fun day would include sumo suits, a jumping castle and Dora the Explorer, along with face-painting, stalls, games and a barbecue.

Horsham’s Des Lardner’s Organic has thrown its support behind the event.

Manager Tami Lane said the business had received items worth $3500 for a raffle.

Raffle tickets are $2 each and are for sale at the business, Cafe Jas and McDonald’s in Horsham.

Mrs Lane said the major prize was worth more than $1000 and included a wheelbarrow, shovel, AFL tickets, Waeco seat warmer and a barbecue cooking set.

Mrs Lane said she expected a couple of hundred people to attend the event.

Cory's older sister Emma Ward thanked Gemma and Des Lardner's Organic for their efforts.

She said Cory was too unwell to attend the event but his sisters would represent him.

"I can see his body is giving up but his brain isn't, that's for sure,'' she said.

"Cory is extremely grateful for all of the support he is receiving.''