I don't know where else to post this.
I have ONE ticket for the telescope tour at 10:45am Saturday the 25th June. TOMORROW. It was the last ticket available and I got it for my wife, but she now has to work. PM Me if you are interested in my ticket.
https://maas.museum/event/free-museum-weekend/
Look up the details yourself on the above link, I believe you get a view through the solar telescope. But I am not sure what else this ticket entitles you to. I believe it was a 30-45min tour.
FYI, powerhouse and a few other things are free this weekend.
Dimithri.