I am hoping to take a couple of days off before Christmas and may use this for my sub. Hopefully I will come back and write detailed plans for this to share with you.
I think that this lesson at FunArt4Kids could be broken down enough for any sub to be successful.
Paul Klee's Senecio at the blog Fun Art 4 Kids
If you are lucky enough to get a sub who can use your computer, projector and PowerPoint, they can use this great presentation here: Paul Klee. If you can also always print it out for your sub. (This blogger has a nice collection of other artist PowerPoints too.)