These tutorials are listed (roughly) in order of difficulty (but feel free to try anything you think looks interesting!).
Code.org has lots of intro-to-coding activities with fun themes!
(Awesome bonus: all of these activities will run on a mobile device like a phone or tablet!)
Scratch is an amazing platform for creating games, animations, and much more!
It runs in a web browser (like Chrome or Safari) on any device, or it can be installed and run offline on Windows, Mac, Chromebooks, or Android tablets.
The Scratch foundation also has a free curriculum available in many different languages. There are free online courses available through Pluralsight and edX, and the Scratch Wiki can be a fantastic resource!