Just took our toddler son to the Model-X exhibition in Auckland this Queen’s Birthday weekend. He loved it, particularly the large model railway displays put on by various modelling clubs around New Zealand. The Tauranga club’s display was particularly impressive. He also really enjoyed (random clapping and laughing) a display by a gentleman that collected the rather rare Tyco electric toys.
I picked up a 50 x 40cm grass mat made by Busch Model that looks to be ideal for 28mm fixed tabletop terrain. It looks like Kelmarna Loco Depot might be the NZ suppliers.