I make gimbal keychains for most holidays as a fun "business card." They're great small pieces that can easily show off some of the things you can do with 3D printing.

Here's the one I made for Halloween!

This prints as one single piece and as an added bonus the raised name on the side works great for embossing and stamping.

I typically use the beaded metal chains for the keychain part, specifically this one https://amzn.to/3PDX4YD (affiliate link)