This is a set of simple CSS Grid examples I (Bill Odom) originally created for a talk called "CSS Grid: Get ready to fall in love" at the 2018 Craft Conference (although I've added a few things since then). You can find the latest version here:
If you'd like to try the application without installing it locally, you can run it entirely within your browser via StackBlitz:
Note: While the examples are hosted in an Angular app that uses Sass, that's just to make some things easier to build or demonstrate. None of the CSS Grid concepts are specific to Angular or Sass.