What to do in Melbourne with 6 adults?

Hiya Lisa

When are you heading over and where does your brother-in-law live?? My mum came to visit me early last year and she is quite disabled so it was hard trying to think of places to take her as everywhere involved walking great distances. 

Both  Melbourne Zoo and Melbourne Aquarium are cool, there's also Eureka Skydeckwhich is pretty good (if you like heights) as it offers sensational views of Melbourne. 

I would also recommend hiring a car for a couple days and head down to Mornington Peninsula and Sorrento for a squiz around the shops and go to Portsea for lunch at the pub which has a fantastic view of the bay. It really is quite lovely down that way and the drive is quite scenic. While we were there I took my mum to Peninsula Hot Springs which was super relaxing and great therapy for her. Not sure if your bf's nanna would be up for that, but there is a lovely cafe there she can relax and enjoy. 

There is also Daylesfordwhich is lovely day trip for lunch one day, expecially at the gorgeous  Lavandula they have a stunning garden area where you can chill out and relax, and their lavender menu is to die for!  

Another thing you can do is catch the  Williamstown ferry along the  Yarra River to  Williamstown (Australia)

I hope that helps?

Have you been down to St Kilda Pier to watch the one of its best kept secrets is a colony of about 1,000 Little Penguins which has made its home there since 1974.  This remarkable Melbourne home, unique to St Kilda, is the only confirmed breeding site for Little Penguins that is directly attached to the Australian mainland.  Leaving their burrows before sunrise and returning after sunset, our Little Penguins spend their days in the bay feeding on small fish like pilchard and St Kilda Pier Breakwater

http://parkweb.vic.gov.au/explore/bays-rivers-and-ports/port-phillip/things-to-do/st-kilda-pier-and-breakwater

I'd also add to the great comments above:

the National Gallery of Victoria, it's free and has a great collection of art & nice cafeteria and restaurant.

Another option could be having high tea at The Hotel Windsor 111 Spring St, Melbourne VIC 3000, it's a true Melbourne institution! For this you will need to book well in advance. For a more cost effective option you can try the afternoon tea at newly restored restored, heritage listed Myer Mural Hall 6/314-336 Bourke St, Melbourne VIC 3000. 

We are planning on going to the following: 

Melbourne Improv. Night ( Improv Melbourne). 
Melbourne Zoo
Melbourne Aquarium
Eureka Tower Skydeck
Queen Victoria Market

Williamstown (Australia) (across the ferry).


Is Witches In Britches worth going to? (On Dudley street).
(It's a show and dinner thing).

Is it worth going to the The Colonial Tramcar Restaurant? 

Is it worth the effort to go to the Hellenic Museum on William street?

Thanks everyone. Lots of great ideas. We had a blast. Went in March this year.