they are bells, bells bells bells of all sizes. Local gypsies or just local people sell them (push them on you, lol). ITs their way of earning a living.
You feel bad so you eventually give in and buy one...and that is the kiss of death as they will try to sell you more!!
The bells are sold by about half a dozen sellers outside the ski depot at the Malina ski area, and they are a pain in the butt, they won't leave you alone..... sometimes you just have to be rude and tell them where to go.
but dont those little bells ( cheap very cheap) sound lovely as you open the door to your office for the rest of the year. It reminds me of what has just been or what I am looking forward to ( depending the time of year) as they jingle jangle each time the door opens. Best price 2 small for 5 lev.