hey Mr NQLD_Newby welcome to mexico...Take the kids to science works on your visit...Kids love it>
http://scienceworks.museum.vic.gov.au/
They have the Lightning room for Vandergraph displays HV and Planetarium for various astro displays:
http://scienceworks.museum.vic.gov.a....asp?ID=561321
http://scienceworks.museum.vic.gov.a...tarium.asp?s=1
Just one thing if you go on public holidays get there bang on opening and book tickets for the above events, they sell out quickly.