We used The Foos during Hour of Code with many of the younger kids. It’s available as an app, on the web, and as a downloadable application for Macs. We found that the Kindle version was a bit clunky, but the kids had much better luck with the web version. Unfortunately the web version appears to be limited, so they won’t be able to get as far as they might in the app. They really enjoyed it, regardless, so we’ll keep this in our toolkit!