You are looking for a fountain pen that writes with a certain thinness or thickness.
A website publishing reviews on fountain pens based on their writing thickness.
Each viewer can have their storyline based on their decisions.
Create multiple forking points in the movie. When the viewer reaches such a point, the movie player will give him a choice of which direction to continue.
Get inspired.
Publish articles, pictures, and videos, of what inside interesting labs around the world.
Get a definitive guide to books on different subjects.
A book series. In each area publish a book of books. Each book has all the timeless classics on that subject listed. Each one with a short synopsis, a longer analysis on the main points of that book, and the reasons why it is such a timeless book.
Find the (constantly changing) thought leaders in a field you’re interested in.
Publish and continuously update a list of thought leaders in different fields, with some information as to why they are considered the thought leaders in their fields.
First step: measure interest