I've used 6 old cafeteria trays to set up still lifes. I lay a sheet of paper on the
tray, arrange the items, trace each item on the paper to avoid arguments (this
is in 5th grade where arguing is a sport). I have 6 tables of students. Kids
can rearrange themselves around the table, but cannot rearrange the stuff.
Since the items' spots are traced, the correct position can be determined over
the course of days. Jeannie in PA, k - 5