Wow... I could have quoted half the posts here, especially OZO on age and Martial Arts.
I'm 49, ~9 years of martial arts, and started skiing when I was 20 (family didn't ski so it never came up until I started with some friends). First place I ever skied... Wildcat! Wildcat has always been a favorite for it's old-time feel, the views and great terrain.
Anyway... I started my sons at age 4 and 6. we thought we'd put them on snowboards but read that kids were not yet developed in the leg muscles for that stance so we put them on skis and figured if they wanted to switch later they would. They stuck with skis and both have twin tips (me too). They are big on moguls and glades, the steeper/gnarlier the better! it keeps me "young" trying to keep up with them. (they are 13 and 15 now) I actually started Martial Arts as I was starting to feel my age (I thought 40 was old at the time!) and it is a great help with flexibility and overall body strength and control, especially as age tries to rob you of just those 2 things.
advice on starting... either ski or snowboard will have it's learning curve so it probably doesn't matter (I've never boarded so I can't speak to it). Being good at skating helps but there's no avoiding the clumsy stage of having skis/snowboard strapped to your feet so be ready to fall a lot at first. Myself and a lot of first timers make the big mistake of dressing all wrong. Jeans and cotten thermals. You end up soaked and freezing! if you don't already have the right kind of cold/snow pants, gloves, coats then get them.
Don't get frustrated and give up (an issue you have to watch with little kids) as you will catch on eventually, and it is a great way to make use of Winter, where too many folks stay inside and veg.
you can rent to start but it you think you are going to stick with it, find a ski shop that will set you up with a package that's right for your ability, possibly used equipment (save a lot of $) which will be fine for the early stages of learning. If you stick with it and get better you can then move into gear that fits what you most like to ski (moguls, freestyle for the kids, race/slalom, etc)
Did I leave anything out?
