Makey Makey is another fun bit of hardware for kids. Works great with scratch too, have them make their own scratch game then use makey makey to build their own controller

In a similar vein, if there are no local teams near you, getting some sort of microcontroller that runs micropython could be fun too. I’m a big fan of microbit for younger kids, lots of options for lights and sounds, with a few pins for adding sensors/buttons etc.

Seconding the linked Khan Academy course, i taught a class for a few years that followed those lessons. The lessons are a little outdated, but they’re perfectly suitable for learning fundamental JS syntax.

The visual aspect, imo, is super helpful when first learning. Being able to see the results of your code makes understanding what’s happening way easier. Additionally, those lessons provide hints and friendly reminders to help with syntax errors.

Those lessons in particular use a JS library called P5.js if you want to play around with it outside of the Khan Academy environment. More than enough for making a simple game, and the documentation is pretty great too.