So, these popped up on RCDB at the start of the month

All designed by a guy named Grant Telfer, who apparently also designed the human-powered coaster at Green Valley Farm.

RCDB suggests there's one still operating in Keith SA, and one SBNO in Murray Bridge.

Anyone know anything more about these?

Those are just the known units of this type of coaster.

Footage of one of the two Monash Playground coasters can be seen here 3:50

They also had the single rail type like at Green Valley

https://www.facebook.com/photo?fbid=430243423745618&set=ecnf.100057230269918

The one at Puzzle Park can be seen in aerial images:

https://maps.app.goo.gl/v4B2VvUVQn6emtg16

 

Offt they look like an insurance nightmare .

Love the one at green valley farm.  Drove past the place once but it was closed!!   Would love to go back some time and ride the coaster.

We drove through Keith about five or six years ago and went on the tiny little thing they've got there.

Basically, a little sledge thing you pull to the top of an incline a few feet high. Get on and it goes down, nearly goes up the other side, and back until it plateaus. Kinda fun.