On the topic of chushkopeks, I am married to a Bulgarian, have spent substantial amounts of time in Bulgaria going back to 1995, and I have never seen one of these things. Not at her parent's house, her grandma's houses, the aunts etc. I've never seen one on the street, in a store,  restaurant, or anyplace else. I am starting to wonder if chushkopeks are like snipes - something Bulgarians tell credulous foreigners to amuse themselves.