Wow, it doesn't sound like a great response, but one could assume that she wants to arrange for both.
There are ways to come across as 'cross' vs. 'just not understanding' - way 'b' seems to work best for me so far. "Oh, well I thought we had discussed having a separate time as well for ds, please let me know if I misunderstood. DS is really looking forward to some time to really stretch himself in the realm of a full programming language. I am not sure the programming language within the Lego context would have the same 'Oomph' that he was looking for... please let me know~

"
Anyway, that would likely be my initial approach, in fact I've just gone through this, wanting to send my ds teacher a raging letter of 'HOW COULD YOU DO THIS???' type, but took it back down to a reminder about something I'd mentioned and curious how that was going and could we have a meeting, maybe something formal - please let me know what
you think. She immediately returned with a cheerful, yes I am doing some of the things you requested, we can have a meeting, would this time work, and we can have it be fairly formal. (Precisely what I hoped for.)
I could be wrong, but asking questions in a more open minded tone and putting the ball in the teacher's court seems to work ok, maybe I have just been lucky so far.
The opportunity sounds awesome and should not be rolled over just because the teacher doesn't 'quite' get it...she will hopefully with a gentle push. And I always feel like 'time's a wasting!!' so I tend to get more anxious than I ought to about such things.
If you don't get a good response after your initial try to remind her, that is the time to get more specific, pull more people back in to talk, imo.