If it has a display anywhere, my friends made a game of showing me things and seeing how the display reacted when they visited me - this was an in-hospital EEG though. Head itchy was a big problem, but darn did it feel great when they took it off and scratched off all the glue!
I might actually recommend an in-hospital over an ambulatory if you can get away with it. I only did an ambulatory as a child and don't remember it much, but as an adult having a week to just focus on the EEG in a hospital was good, at least for my personal goal of having a seizure on-record. All caffeine, no sleep, I wasn't in a place to do much anyway.
Hope you got the info you need!