Yeah I remember Wobbies World. Had a few birthdays there as a kid.
They has a home made fibreglass helicopter ride where these mini helicopters trundled around an elevated monorail. There was one drop that was quite scary with an almost 90 degree turn.
They also had some mower motor driven 6 wheeler ATVs that followed a central rail and went around an all terrain track.
They had an old Viscount airplane in the middle of the park which I think is the one now at Moorabbin air museum.
The park has since shut and half has been carved up for residential development.
The rest remained with the original owner who has just renovated the original castle entrance and opened a plant nursery.
The hydraulic helicopter ride was dismantled and it sitting on a farm on Dandy Frankston Road.