[codedrivendev]

I know others have already mentioned it, but i've recommended https://flexboxfroggy.com/ to others before and they quickly picked it up.

This is another good one for learning css grid https://cssgridgarden.com/

[yoav_sbg]

I like the gamification of the cssgridgarden, it is similar to https://www.codemonkey.com/ which is mainly for kids!

[kmoser]

One of my flexbox faves which is very similar to OP: https://flexbox.tech/.

A useful tool for generating Bootstrap code is https://build.layoutit.com/ and for CSS grid https://grid.layoutit.com/. Unfortunately the former is limited to Bootstrap 4, not 5.

[KolmogorovComp]

I tried flexboxfroggy, and while the concept is nice and well executed, the lack of syntax completion really is putting me off.

[dieselgate]

This is hilarious hope it is satire

[KolmogorovComp]

No, why?