Kazakhstan
This is exactly the sort of thing I like bringing back from Kazakhstan: small enough to fit in a bag, but specific enough to remind you where you bought it. The trick is to choose the simple, well-made version. Small craft items look better on a shelf when they are not too shiny or mass-produced. It is also the kind of thing you can talk about when someone asks what you brought back, because there is usually a little story attached to where you found it.
Kazakhstan
Kazakh black tea is worth adding because it feels like something you actually noticed while travelling through Kazakhstan, rather than a generic souvenir. It is a good one because people can try it slowly at home, and it makes a nicer gift than a mug with a place name printed on it. The ideal version is modestly priced, not too bulky, and good enough that you would buy it again even without the holiday memory.
Kazakhstan
I would put Kazakh chocolate on the list for Kazakhstan because it is the kind of thing that feels useful once you are home, not just another airport purchase. Look for a boxed version with a decent date on it, especially if you are buying it near the start of the trip rather than at the airport. The reason it works is that it gives you a quick reminder of the trip without needing to keep a fragile ornament safe forever.
When I think of an easy, crowd-pleasing thing to bring back from Kazakhstan, kumis-inspired sweets is a good pick because it does not need much explanation when you hand it over. I would buy a couple of packets: one to open while travelling and one to bring home unopened, because snacks have a habit of disappearing before the flight. I would rate it higher when it is locally made, clearly labelled and easy to use at home, and lower when it is just tourist packaging.