[sametmax]

> Jupyter notebook for instance can actually be a huge problem form someone trying to understand flow of control, since you can execute code blocks in an arbitrary order into the same runtime.

True. I usually don't let them know they can create several cells first. They use only one for a good part of the show.

Skulpt will lead to strange debugging sessions, and you really, really want them to learn how to debug autonomously asap. So having the same stacktrace in every env is very important.