flexplay.js is interactive for learning a flexbox in CSS. It will show a real-time view of how flexbox will work where you will see directly with your eyes. There is no prior experience needed, which were few flex property controls.
Web designers know the flexbox property and how flexbox will work on the browser where flex play js will show you an interactive flexbox viewer.
Javascript
I am still working on this flexplay.js to build the entire process soon.