In reply to Denni:
Will she be having lessons? If so, my experience is that instructors will soon tell you if the kit looks wrong - I've seen a few parents told they should go back to the hire shop after the first day, and ask for short skis, or for the skis to be serviced and edged, etc.
Judging my mine at that age, she'll probably be in fairly soft boots (eg Salomon T1) and maybe 90cm skis (similar height but a few kilos lighter, I think).
She'll almost certainly be skiing without poles - which means mitts are much easier than gloves. And be expected to wear a helmet - worth making sure it has a functional goggle clip on the back if you don't want to lose them. And possibly buying a helmet cover, as kids love them!
Also, well worth making sure she has salopettes with internal snow gaiter. Some kids ones just seem to be elasticated round the bottom of the main leg, which, IME, might be OK over snow boots for sledging, but is a recipe for snow in boots, wet socks and miserable child when learning to ski.