I am trying to put together some demonstrations for E&M class related to the topic of conductors in electric field, particulary that the field inside is zero (something like Faraday cage) and that the field gets stronger with curvature. I have seen videos of the courses with some great demonstrations, but I do not have enough equipment to reproduce them in our lab. One thing we do NOT have is a decent electroscope to measure (or at least compare) the charge. We have some foil-leaf ones but you can't observe much of an effect on them. We do have a VandeGraaf generator. Does anybody know of any experiments that could be set up with some basic materials? Thanks!