You may know that I like video games. Never been a gamer, but after all, I've started to code because of games.
I have discovered 3 funny games that aim to teach how to use the CSS Grid Layout and Flexbox.
And the third one is aimed to flexbox, the flexboxfroggy.com.
The games can help a lot to teach and strengthen the basic concepts of CSS Grid and Flexbox. But, you will need to put them into practice. So get yourself a nice code editor and start messing around!