Their Website says -
“A ride on the Portarlington Bayside Miniature Railway is an unforgettable experience. As the train departs from Point Richards Station your are overcome with the freshness of the ocean breeze, as the train winds through picturesque parklands. Allow yourself to leave behind the modern world and become immersed in the charming atmosphere that our railway has to offer. Be whirled away into the past and imagine the powerful sounds of a roaring locomotive, with its whistle echoing across the Bay. The magic and charm of the miniature railway has brought enjoyment and fun to a generation of families over many years since the first operated public running day in January 1999. “
I suspect that they are taking a bit of poetic license with this description but you get the picture. The railway generally runs from 11.am to 4pm on Sundays, and it is best to avoid these times to get the cache unimpeded. It is a 1 litre painted sistema and should not be hard to find.
For more information go to https://miniaturerailway.com.au/