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
I’ve written a handful of dumb magic items, but none of them have come up in play yet. My favorites are a Wand of Lightning, which is made of copper and can call lightning to the wand’s location if you point it at the sky during a storm; and the Solar Tuba of Illumination, which glows when you play it but only works in sunlight.