I went here during a school camp when I was 14 to the ACT and have nothing but fond memories of the day.
At the time we went there was a carnival exhibition and we spent the majority of the day in that area. The whole exhibition was about the science behind carnival rides and illusions and our whole experience was nothing but laughing, screaming and being big kids.
A friend dared me to stick my head in the guilitine hologram and it was so life-like and nerve racking I screamed and the whole room started laughing with me. Great fun!
If I ever have kids I am taking them up here for a weekend as even I wouldn't mind coming back (now 23).