[jyl]

I'm going on Friday to get trained on a scanning electron microscope that is on loan to my kid's school. We parent volunteers are then going to supervise the kids using the SEM during the next few months. We're supposed to bring something small and dry to try scanning. Can I bring a paring knife, d'you think? Any other tips?

(I mostly signed up for this in hopes of repeating my microscope-photos-of-knife-edges. I have no idea if a SEM is appropriate for scanning objects like that.)

If metal is a no-no, what is interesting to look at?