So I booked her in to a set of three taster sessions, was delighted that the person answering my emails was really helpful and friendly, and took her along on Sunday morning.
She was quite nervous in advance, and tried to back out a couple of times, but I managed to persuade her it *might* be fun, even if it was a bit scary, and so we walked down there together.
The studio is called Babyballet, which made me worry that it was going to be some kind of intensive hothousing, but it turned out to be 5% "Here are some really simple moves" and 95% "Here is a bunch of fun dancing for all the kids to do together." The teacher was really lovely, great with the kids, and made sure that Sophia had a mat to sit on that was directly in front of me in case she got nervous.
In the end Sophia had an awesome time, and the first thing she did at the end was demand to know when she'd be going back. I've told her that I'll buy her an outfit if she goes to all three taster classes and still wants to go again. And now I've worked out that I might be doing this every Sunday for *years*!
*Yes, all one word.
Original post on Dreamwidth - there are comments there.