This has probably come up somewhere but I am keen to hear your guys creative or interesting items you gave your players. I think there is a lot you can do but sometimes I get stuck in my head when thinking of cool items that are not just overpowered.
I go first: a magic music sheet that when played has a certain effect (in my case a “sonata of the forgotten”, effect is pretty campaign specific) unslippable shoes, glowing chalk you can use to mark smth for example in a labyrinth and a mirror that makes invisible things visible


Bagpipes of invisibility. Turns you invisible, but only when you are playing them and they are LOUD.
Still good enough to give an attacker disadvantage in a fight, but the player won’t be using them to sneak into anything lol. Eventually I had the player I gave them to receive instructions from a master bagpipes player on how to play them without using their hands as a minor upgrade