Geocaching is a great family activity that can take you to pleasant places both near and far. We started caching as a family through a few caches of varying difficulty nearby. This cache, our second hide, is a relatively easy multi stage cache to help others get started.
The listed coordinates will bring you to the Croydon Parkour area. It was the first dedicated parkour playspace in Victoria, and is a welcome change from the cotton wool wrapped play that children seem to be subject to these days. There is also a large playground and skate/bike ramps here. It is a high muggle area at all times, though the actual cache is hidden in a quieter area of the park.
From Wikipedia - Parkour originated in France as a training discipline using movement that developed from military obstacle course training. Practitioners aim to get from one point to another in a complex environment, without assistive equipment and in the fastest and most efficient way possible. Parkour includes running, climbing, swinging, vaulting, jumping, rolling, quadrupedal movement, and other movements as deemed most suitable for the situation. Parkour involves seeing one's environment in a new way, and imagining the potentialities for navigating it by movement around, across, through, over and under its features.
To complete this cache you will need to do some basic physical and mental activity. Or get one of the many children who almost constantly inhabit the area to do this for you. We have seen a five year old (almost six!) do this, plus many dad-bods as well. In the spirit of parkour, no special equipment should be required. This probably includes calculators. Perhaps teamwork may be required for some cachers.
At these coordinates you will need to collect three numbers which are written on the tops of some poles. The numbers are on the highest poles where the tops are physically accessible - A and B on one pole, C on another. Neither of the poles are ones with metal bars. These numbers can sometimes blend in to the wood under full sun, but are readily visible most times or when a shadow is cast over them.
A - The largest number, in a typographically sense, on top of the tallest pole toward the Northern side
B - The largest number, in a numerical sense, on top of the tallest pole toward the Northern side
C - The number on top of the tall North East most pole.
(Regarding A and B - it is the north-most one of the three that are roughly equal second highest overall)
Substitute those numbers in to the following coordinates:
S 37° 47.((A+B+C)x(B-30))+(C/3)+(B/2)
E 145° 17.(A+B+C+4)
Once the final coordinates are solved, you are looking for a common magnetic camouflaged mint tin container (no room for swaps). Please re-place it well.