how do you thank a government employee?

over the weekend, i spent some time writing thank you cards to six or seven people that have helped chris and i arrive at being invited- from our recruiter, to our med assistant, up to our PO.

what's sad is that these little cards look so lonely and my normal method of thanking people- sending cookies- has chris looking at me like i'm crazy person.

'you can't mail cookies to a government office' he says.

'i won't cover them in powdered sugar!' says i.

what's a hopeful PCV to do? risk that the cookies could be destroyed upon site? just send the cards? i really want to honestly thank these people (especially our recruiter and PO- they have both been amazing, so candid, and so clearly pivotal in the process!), and my usual idea seems suspect.

thoughts?