yeah, I know what you mean about the one in Kyneton, as we live near there. I'm not sure about other indoor play centres. There is the cafe called Ethic in Woodend, which has a small play area for kids and hopefully has air con (?) I'm not sure if there is anything in Gisborne - unless you're up for going to the pool - probably hard on your own with two kids? I've been to an indoor play area in Sunbury, but it's kinda co-located with an indoor cricket place. Half of it's kids set up and half is indoor cricket/nets. I can't remember the name, but can get onto a friend who took me there, to find out.
I don't mind having the two of them once we're IN the pool, it's the faffing about getting undressed/dressed that does my head in a bit but I should try it again. Yep, Ethic is great but really only good for a coffee not for an all arvo escape. I think that Sunbury one might be the one I tried to find - think I saw signage with indoor cricket and thought I must have wrong place.

I'm near Wallan & we like that one
With notice some BB ladies could meet you.
No worries, ZF - I'll post when we're heading up there and if anyone's free, that would be great.

why don't you invest in one of those aircon fans?
Yeah, we might get aircon at some point but really only solves half the problem. Still need to find something for the kids to do that will burn off all their energy. We're really not stay at home all day sort of people. Did that yesterday apart from a quick (for us) half-hour trip to the playground and they didn't go to sleep till 10pm. They're used to being active so I need somewhere they can run around like idiots for a few hours.