I think I'll add "washable glue stick" to my list.
I think I've got a back of film like that too -
But that gives me another idea - using an old overhead projector as a tracing stand. Darn - where I work dumped a bunch of them last year (no one wanted them) and that would work great. I'm going to ask if we might have a few more to get rid of. We're converting all the classrooms to Promethean boards, so we may have more come available in the future.