I was 6 when I learned to crochet, it wasn't until I was 11 that I decided to give knitting a shot.
When I learned knitting, the needles were too long and too slick for my small hands to manage easily (I was small for my age until I hit about 14), especially when I would have to hang onto the needles with my non-dominant hand to throw with my dominant, and after all my years of crochet at such a young age it was hard to brake out of that motion and do english throw. My mom offered to find out how to do continental for me at one point, but I wanted to do it "Like mama" and wouldn't change - this was also before the interenet was a good resource for things like that, so trying to learn continental from a book, and them making it into left-handed continental was not always a simple task.
I still wonder why I got so frustrated with knitting when I look back on the other things I was doing at 11, I had already been playing harp for 2 years and been playing a pedal harp for over 1 year, my life revolved around my crafts and music and I was an avid crocheter.
I knit a good 2 or 3 feet on a rather wide scarf, but eventually something frustrated me enough about it that I stopped and eventually decided that knitting just wasn't for me.
Heh. I was kinda wrong about that 'not for me' part, but it did take me over 6 years to give it another try, and that was only because I had a reason. Even then I was resistant, but my mom encouraged me to pick up the needles again, I found I had retained most of it, but I picked up the yarn continental, didn't realize I was doing anything different until I asked my mom if I was doing it right... "yes dear... but... I think you're knitting continental..." :teehee: - after crocheting for about 11 years, continental just felt natural.
So my answer would be; I'm sure you can teach her how, especailly if she wants to learn, but I would suggest teaching her on bamboo needles with wool yarn. If you can, try to give her the option of english and continental, and if she still finds it overwhelming with all those needles and stitches, see if she'd like to learn crochet instead!