a 12-year-old boy found the world 's largest european wasp nest ever found .
jordan waddingham made $ 20 from his mum for his startling discovery .
it measures at one metre tall and a circumference of three metres .
the nest was destroyed overnight when the wasps were dormant .
it took two days to remove the 90-kilogram nest from the ground .
the nest is being displayed at the queen victoria museum and art gallery .