What is an item that spins when spirits are near kind of like the thing on yugis neck in?

You're likely thinking of the Orichalcos Pendant worn by Yugi Mutou in the Yu-Gi-Oh! anime. This pendant, imbued with the power of the Orichalcos, would spin wildly when evil spirits or powerful forces were near, acting as a warning to Yugi.

It's important to note that this is a fictional device, and there are no known real-world objects that behave in the same way.

While the Orichalcos Pendant is a fun element of the Yu-Gi-Oh! world, it's a product of imagination and not based on any actual spiritual practices or beliefs.