Pendulum Painting. This would be a great science based lesson for EOY. This was always one of my favorite projects in middle school and I still have all my "drawings" now. Great way to tie a lesson in with this and very inexpensive. - Heart-2-Home
Blind contour drawing is a fun way to see how accurately we can draw when we observe something very carefully, by looking at it and not looking away. - Using a paper plate is a great way to accomplish this.