This is a crash course in Creative JavaScript that you can go through in a single day. It mainly focuses on the JavaScript canvas, and covers the basics of drawing simple shapes and lines, setting up animation processes, using sprites, going fullscreen, simple blending, translation and rotation, mouse interaction and simple simulations, whilst also getting you more familar with the basics of variables, conditionals, loops and functions.
The material is all up on mimicproject.com. Here are the links in more or less the order you should tackle them. I'd recommend doing this in groups, like a workshop style activity, but you can also go through them on your own if you like.
This cheatsheet is pretty handy too :
https://mimicproject.com/code/9ef19ff5-d582-4b95-50eb-ea21a63dfb64
https://mimicproject.com/code/b9b12af0-8811-44a3-5c5f-45221bfb7605
https://mimicproject.com/code/927aba4e-5652-7617-8f6e-c18a51f32d3a
https://mimicproject.com/code/3860fcaa-ab6c-5165-1178-8f1120c7bae7
https://mimicproject.com/code/95bbe0cf-63dc-cc52-2397-3bb51d7e6251
https://mimicproject.com/code/fd8c79da-a495-1315-54f2-2c6de390685b
https://mimicproject.com/code/126cdb47-499e-4d11-d7cb-2d51259d34d9
https://mimicproject.com/code/41cf3f4a-ab7b-37ec-2055-d4cee9579651
https://mimicproject.com/code/a6da9d47-f6e1-f707-e729-ee8083115254
https://mimicproject.com/code/e8b01937-d1de-9a71-df5d-9f55041a88c2
https://mimicproject.com/code/b7818244-4435-d97e-65ec-d16efcf80f55
https://mimicproject.com/code/b8d3fd2e-e639-8548-ced9-7fef0be8983b
https://mimicproject.com/code/3bd29c55-3d19-13f4-68bd-8da7ec2f1a26