Unit Plan

Our Unit Plans are not due until the 17th however I know planning a unit is a lot of work and I do not like leaving things to the last minute so I have begun to think about what lessons I am going to do besides my enviroscan lesson.  This has been really difficult because although I agreed to the theme of environment I don't feel a particular drive to create or make anything.  I am very interested in the artists and the lesson we have already done although I dont know what else to do.
 I do not want to do cliche lessons.  Although it is cliche I am going to do land art sculptures inspired by Andy Goldsworthy.  I believe if I do them in a collaborative manner it will be helpful for students.
Next I thought about doing leaf impressions, however the environment is more then just grass and my focus of the theme is taking art and making it accessible to look at and to create.  I found the artist Louise Nevelson who makes found art sculptures.  I think I will use her as an inspiration and have my students make sculptures using found fabricated objects, however is this too repetitive? I want to use unconventional materials but if I do this week after week is it still successful?
Last I want students to have freedom to explore an environment that they encounter everyday or that is special to them.  Then they will use materials and only materials in that space to create their artwork.  For example I thought of the bathroom and using anything I can find in there to make a painting.  However I do not know if this is too broad.  Will students not know where to start or what to use?