The New Zealand Museum in Wellington was one of the better ones.  It was free first of all and had a great section on Maori culture and the unique geophysics of the region.  It also had a hands on section where the kids could test their skill at sheep shearing!  While Brennan has a rather unique style, the computer scoring system suggests that they may have "done irreparable harm" to the sheep during the shearing process and should stick to the cities!.  It was a virtual bloodbath.