She drops the branch and fetches a half-rock for examination.

"Hmm. It would take more knowledge of building things than I have at the moment." It has never been clearer that she intends to gain more knowledge rapidly. "But it shouldn't be difficult. You grew your own crystals, you say? What differentiates the sort you grew from any other sort?" Her brain is whizzing along madly in true Matilda fashion. "And would perhaps the sort of power cells you have for the PKE meter, the ones I'm not allowed to make on account of their being radioactive, work well?"