For older kids, I like this interactive javascript book https://software-tools-in-javascript.github.io/js-vs-ds/en/ https://software-tools-in-javascript.github.

For older kids, I like this interactive javascript book https://software-tools-in-javascript.github.io/js-vs-ds/en/ https://software-tools-in-javascript.github.io/js-vs-ds/en/ and this simple set out https://software-carpentry.org/lessons/ https://software-carpentry.org/lessons/