I have been lucky enough to do this experience twice. Once with a close friend and when I took my Mum as a Mother's day gift. It's definitely a unique day out.
Kids are allowed and encouraged to do this experience too. I will definitely be bringing my kids in the future. The only condition with taking the kids is that children under 8 years require a ratio of 1 child to 1 adult.
You arrive at the Werribee Zoo and get on one of the smaller shuttles which takes you out to where the Giraffes sleep - the keepers tell us about the Giraffes and where they sleep, their health, what they eat and a bit about their personalities.
Then the exciting part happens - the Giraffes come over to meet you - don't worry about missing out as there are a lot of Giraffes here.