Thanks guys,
I don't think B would be big on games yet either, and also there's going to be quite a range of ages there, I think.
So far I've bought a bunch of blow up balls on ebay, so I'm thinking they can run a-mock with those without doing too much damage (weather permitting - pray for a nice day for us!) and take them home instead of goodie bags.
Face painting sounds good, I'll have to look in Melb child to find someone, I think.
Let me know if you think of anything else
Cheers