Well, only you can make a judgement re: your child, but if she's in good health and meets the height requirement, why not?

My DS9 (at the time) went on Rockin Rollercoaster and could not get enough!!! He probably would have ridden
that 10 times in 1 day if the rest of us didn't have other plans!

Yes, it takes off fast but it's over pretty quick, too!