Whoa it sounds cool. Everyone knows what Scratch is. The programming language for kids, and almost has an idea what arduino is.But this two names together? It's not possible. Yes is possible, many people complain that is difficult to program in arduino. They will like something simple as the Lego Programming.
I was reading yesterday, and discover this: S4A
Scratch for Arduino. I haven't try it yet, but I am waiting to get home tonight to test it.
I will do some of the tutorials and write about it, if you have test waiting to read your opinion about it.