Even easier: https://jsfiddle.net/z67w94jr/ https://jsfiddle.net/z67w94jr/ I was able to type that out on my phone with only a little bit of trouble. Reworkin

Even easier: https://jsfiddle.net/z67w94jr/ https://jsfiddle.net/z67w94jr/ I was able to type that out on my phone with only a little bit of trouble. Reworking jsfiddle's UX to be optimized for smartphones (aka remove the huge left div) is an easy win. I'd be surprised if there wasn't already something like that in the edtech space, where teaching kids to code is currently very popular.