I Do 3D Vertical drawing has become really popular.
First, it is probably the first time you can draw vertically with a pen! The colors that come with the packages are cured with a small lamp so the things you have drawn are durable.
There are many options with these pens, and templates are included which one can start with.
There is also a website where you can find several possible projects, they just need to be printed out on paper.
But otherwise it is putting your imagination in motion and creating your own artworks.