Summary

A spinning bell mounted on the tire in which you pull a string my pressing your thumb against to pull the bell to the tire.

Designed for this bell found at Walmart: https://www.walmart.com/ip/Schwinn-Spinning-Gears-Bike-Bell-for-cruisers-kids-bicycle-path/855623518

Used this screw set with the heads of the screw on the inside of the print facing the tube of the fork.
https://www.harborfreight.com/70-piece-stainless-steel-machine-screw-kit-67674.html

Attach with cable ties and a rubber band to pull the bell away from the wheel when not on use. Used a bowden tube as the "bike cable tube" and balloon string as the "cable". I tried to design this to use anything I had at home. DIY FTW

https://www.youtube.com/watch?v=DhV4-UoVgAk