Please, keep fun private.
Instead of having a fun, be useful. Find open source projects or problems you want to solve and contribute. Combine your fun with real value. If you have such kind of passion, like making things maximum simple, want to do Vanilla JS and solve JS fatigue, you can take a look on BunnyJS. There is hella a lot to do. I am also working on a some kind of builder which will make build process for JS, CSS, SVG and docs simple.
Before starting a new idea or a project, you first should do a research, describe a problem and gather some people for discussions.