hi i need help w some old stuff i got

ok so i got some 1984 bosnian winter olympics merch, specifically of their mascot Vucko and like i DO NOT know how 2 like yk take care of it, i got like 4 pins, one plush, one keychain and a cup and i dont know if i should clean them or not/how i should clean them. Theyre currently just sitting on my shelf where i put most of my olympic stuff

srry if its hard 2 understand i wrote this quick ok thx bye