In case you are interested, there is a curriculum that ScratchEd team has developed. http://scratched.media.mit.edu/resources/scratch-curriculum-... Personally, I also "wing it". I encourage them to come up with ideas for games, animations that implicitly requires them to cover all aspects of "computational thinking". It's implicitly because I don't want them to think of this as too academic; let them have fun while learning (for a change!)