Principal Ray Knight said there would be a $100 reward to whoever found the lost capsule.
‘We are hoping one of the highlights of the day will be to open a time capsule buried more than 38 years ago,’ he said.
‘Despite hiring a company with a ground-penetrating radar, we have not been able to find it.
‘If anyone knows the location they will be in for a windfall.’
Mr Knight said the community and past and present students are encouraged to attend and the event had already generated a significant amount of interest.
He said money raised at the event would go towards the construction of an adventure playground.
‘The focus will definitely be on the children,’ he said. ‘There will be a bouncy castle, a tea-cup ride, a small animal zoo, face painting and a cardboard city for the kids.
‘We will also set up an archive of photos and artefacts in one of the classrooms to show off our proud history for both past and present students.’
Mr Knight said the event would showcase the school’s circus team the Wilson All Stars and each class would do a performance as part of six hours of planned entertainment.
‘It’s going to be a great day and a fantastic opportunity for past and present students to come together and celebrate our wonderful school,’ he said.
Mr Knight said the school had a proud history that deserved to be celebrated.
The event will be held on Saturday October 19 from 10am to 4pm on the school grounds.