Or tens of kV.
A really good performer on youtube is electroboom. Lots of videos including:
Another fun contributor is stryopyro, as at:
including tips on what to do with any surplus MnO2.
Always have fun. And only fun. Designing my first cave radio, I laid a 5x4m loop antenna coil on the living room floor and energized it. Smoke, and vapourised copper tracks from circuit board! Not to be discouraged easily, I repaired it and tried again. Measured 5kV across it! Definitely not for damp caves.