Well it is difficult because there are so many distracting things and programming environments are not very engaging for kids. My two daughters had great fun as

Well it is difficult because there are so many distracting things and programming environments are not very engaging for kids. My two daughters had great fun assembling Lego Mindstorms and Robotis Bioloid kids (with the smallish metal screws). We then downloaded the examples programs to which I did a few changes in front of them, and tried to explain stuff. But clearly they showed no interest in the programming activity. So I did not insist. I may try some time later with an Arduino: I think it is by far the less sucking programming environment for young people, and it basically works (and is text based).