Arduino the Cat, Breadboard the mouse and Cutter the Elephant, an experimental workshop with girls ages 8-11 using the Arduino electronic projects board. From the article:

It was interesting to see the contrast between the two groups - the younger ones appear to me more cautious to stay within boundaries of what they have previously seen as they worry about many things being 'impossible', which for me was quite unexpected. They had less patience with trying to learn the technological parts, although had a good idea of how the flow of action should be for their ideas. Given a slower teaching pace and a more graphical interface, I believe they would have gained much more control over what was happening.

Good follow-ups in the comments on that page, too.