I have been a teacher, tutor, and head of school clubs, as well as director of education for makerspaces.
The tools to focus on are THE FUNDAMENTALS. The fundamentals start with the framing - that means talking about Software Freedoms and our relationship with technology and society.
Then once the foundations are in place, the Free Tech starts to matter. Linux, Firefox, Devtools + html/js, Scratch etc.
Be sure you're clear on what your own goals are. Are you an entertainer, or an educator?