"Well, let's see... there's the impulse engines, but they're nowhere near so impressive as the warp engines," he answered, although of course, if she wanted to see them, he wouldn't turn down the chance to show those off as well. "Other than that, I haven't got anything really impressive left to show off. Could see if there's any maintenance that needs doin'..." Usually, he wouldn't so much as think about letting someone who wasn't part of his crew touch his engines, but once again, Kaylee being a fellow engineer made her a special case.