Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5204042.

Customizable spinning arrow with space for magnets. Spins pretty smoothly, great for playing educational games with your kids. I've used them in my kindergarten class and they're a hit with kids! Use a roll of 25mm stickers to decorate.

https://www.youtube.com/watch?v=3Y3p-fjEyJg