Even without skiing, there's heaps to do in NZ that's kid friendly, either island
We went to Ireland with DS when he was 18 mo and that was ace. London was a bit boring for him because we walked a lot and didn't have time to do the fun stuff like Thomas land, or whatever that is. Barcelona is said to be ace for kids.
Fiji I'm told is great for families, as they also have childcare facilities in the resorts and they LOVE to look afer kids.
Costa Rica is predominantly English speaking and kid-friendly, as is Mexico and the Bay Islands of Honduras.
Hmmmm, let me think. Vietnam is supposed to be good.
Tell ya what, go to your local library and they should have the Lonely Planet book about travelling with children and that gives you great ideas for countries with kids of varying ages.
NZ is great, though, my sister lives in the North Island and we always find something nice to do - beach walks, farm stays, taxi boats to little islands, forests (Kauri forest up north is just lovely!), Waiwera hot springs just out of Auckland, Taupo hot pools, Rotorua and the buried village nearby. Sth Island has the train across Arthurs Pass, the sounds and beech forests, the fjords in Canterbury, Dunedin. Just STACKS!
Have fun