Here are exhibits of lightning.
The first are activities to create lightning. Most of the activities I found were
repetitive so these are the basics.
This is an activity using lifesavers to literally create
lightning in your mouth.
This document has two activities, one to create lightning,
the other thunder.
This activity uses different materials to create sparks by
static electricity showing students what creates lightning.
Here are websites that have great pictures of lightning.
The first one is on the National Geographics website.
Here are 15 powerful images of lightning.
23 more images of lightning.
http://www.livescience.com/11253-electric-earth.html