They're not very interesting buttons -- they've got the seal of Barrayar on them, and are a lovely synthesized variation of brass. Ivan's a big confused over her fascination with them, but he doesn't bring it up. "You'd need a native guide, if you came." He is, of course, volunteering himself. Sorry Miles, he doesn't really care if you have more galactic experience -- you can't talk about it with anyone as Miles Vorkosigan. And if they steered clear of Jackson's Whole, Ivan thinks they might be able to avoid trouble. Perfect.

Encouraging! His smirk turns more sly, and his voice smoother than his normal guttural baritone. "Good to know."