"I recently discovered how to weave." It's not entirely related, but Sansa says she's a seamstress, and Annabeth's brain goes for a brief tangent on sewing and fabric and needles that takes her to her apparently inherent skill for weaving.

"I can follow your logic there, though. And we've already established I'm just as here for the practical magic as you are. Thanks for explaining, and offering to work together towards it. I'm still getting my bearings about this whole place in general - but I'll definitely come to you when I'm really ready for magic."