I am not really actively teaching them, but I am providing some resources like books. My older son (8) enjoys playing around with Scratch. I think it's great and at this age it's just good to experiment.
The only problem is that he ran out of projects or ideas to implement in scratch. So, I bought him Minecraft Education Edition, which actually have support for Block Coding to more a robot around.
And this one for Python: https://www.amazon.com/Python-Kids-Playful-Introduction-Prog...