Students took to water as well as roads with their creative designs in the RACV Energy Breakthrough.
The innovations in technology section saw teams attempt to float boats across water for 10 metres.
Primary school groups had to model their vessels on an insect and make sure it could run self-propelled.
The team from Maryborough’s St Augustine’s used rat traps to power their creation.
Grade 5 student Olivia Teague said it was a different way to use the kinetic energy from the springs of the traps.
St Augustine’s teacher Athina Johnson said the class had spent the whole term working on their design, based on the mayfly nymph insect.
“It got them thinking about problem solving and teamwork,” she said.
“It was great watching some of th