guidance about logo-like projects

hello,

i know many logo inspired activities are on their way using scratch, so i am sorry for those listening to this post who are already very experienced about this approach;

but those project are so many i need your opinion to choose which of them are most suitable for this kind of course (and especially which are the most already tested):

- participants are first middle school grade (age 10-11)

- no previous experience with programming but great interest to learn it

- the course should be divided into small learning units, each having a clear and meaningful goal

- the course is 30 hours long, each lab activity lasts for 2 hours

- finally, i'd like to share the learning results of this course: the projects built by the students will go on scratch site but i'd like to share in a more formal and detailed way the pedagogical outcomes, if anyone is interested;

- the first lesson will be next thursday, the entire course will end on late may

thank you in advance