How to damage the components with ESD?
ESD damage can be very subtle and not easily demonstrable. The eventual failure may take years to surface. Or is only measurable by some change in parameters.

Exmaple, only visible by electron microscope:
https://nepp.nasa.gov/index.cfm/6095


Or here:
http://www.ti.com/lit/an/ssya010a/ssya010a.pdf


I do not think a demonstration will be very effective.