For a change, I am going to bundle these simple things together.
Code Club
https://codeclubprojects.org/en-GB/
Here you can teach your kids a number of new things:
- HTML and CSS
- Python
- Raspberry Pi (a micro computer that can be used for many purposes)
- Scratch
- Sense HAT
- Sonic Pi
“Classes” are divided by projects, I recommend looking around for something that you think is cool.
Micro:Bit
https://microbit.org/
micro:bit is a tiny programmable computer, designed to make learning and teaching easy and fun!
The iOS app looks like scract and does not require hardware.
Scratch
https://scratch.mit.edu/
Create stories, games, and animations
The interface is drag and drop and you begin to learn the basics, from variables to functions and beyond.
Thonny
https://thonny.org/
Easy to get started. Thonny comes with a quick install to get you playing around with the Python programming language quickly.