As far as zoos go, this one is fairly average, I have been a few times with the kids to occupy them on the odd weekend we have had free, but mainly because it is only 20 mins from our house and each time I have been I have had a reduced voucher from one of the various discount sites ie. living social/cudo/scoopon etc and so it has been relatively cheap.
It isn't that big and is in a bush setting so all the footpaths are like dirt/ gravel tracks, there are no big animals here like elephants, giraffes, big cats etc it is more monkeys, birds, koalas, deers, kangaroos etc. They do have a small reptile house and an opportunity to see some animals up close and have a photo taken ( for an additional cost) ie snakes, koalas etc. and also a small kids farm area with baby chicks, guinea pigs, goats and sheep.
There are various toilets around the park but they always seem to have mozzies in them so beware.
The picnic areas are good, plenty of seating under shady trees and also a large grassy area which is more in the sun. There is plenty of parking too and a small cafe area if you decide you want to buy your lunch.
In my opinion, the monkey and bird enclosures are not that big which is sad to see and I know the park is scheduled to close in the next couple of years and will relocate to the south side of Brisbane, as the owner has sold the land to a developer...pretty much new housing has been put up all around it already.
As I said its ok to fill an afternoon if you can get a discount entry voucher; I think Lone Park Koala Sanctuary in Brisbane is a better option for a Brissie animal experience for kids.
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