My kids and I were playing with a small plasma globe like this:
After touching it we all noted a faint smell like that created by other high voltage static discharges, which I always understood to be the smell of ozone.
So I guess this is actually two questions:
- Is the smell associated with static electric discharge in fact ozone?
- Do plasma globes like this create ozone?
(Presumably if the answer is "yes" then it would not be a good idea to leave one of these operating for an extended period in a closed space like a child's bedroom!)