It's loud indoors with electronic games and skee ball, etc. but outside it's nicer with mini golf, go carts and bumper boats. I find that there is something for elementary school aged to teens. My kids have been going for years and there had always been one activity that works. The cars and boats require you to be older (or a certain height). It's especially crowded on school holidays and weekends.
Games, bumper boats and cars, laser tag, a rock-climbing wall, miniature golf, go-karts, junior (under age ten) play area, and a play center all have an Australian theme.