Two great links here from the TES Forum, thanks to “madcat” over there for finding them.

First up is a free e-book “Snake Wrangling for Kids”   aimed at kids and beginners who want to begin to learn to program.

Second up is The LiveWires Python Course  also aimed at kids, but accessible to anyone.

That second link is part of the LiveWires Technical Activity Holiday for 12-15s, which I confess I hadn’t heard of before, but it certainly looks interesting.