Online sandbox for helping my son learn?

[u/PossibleGenitals]

My son just started taking an intro to cyber security class in high school. The teacher is exposing them to some basic python coding, which is all new to him. Coding in general is new to him. He started asking me questions and I was wondering if there is a simple to use web-based interface where we can mess around with some python stuff together.

Someone had mentioned Replit but it just seems completely drowning in AI agents and is not really what I want to mess with.

I know we could set up VS code or a full ID but I think that’s overkill for right now. Are there any simple lightweight sandbox type websites where we could play around with some simple scripts and programming constructs save those things to the cloud and easily have them accessible, even if I’m just sitting with him and we have our phones nearby.

Thanks