For my first prototype, I will keep it simple; wired switch to the double ribbon version. You touch both wires while the switch is engaged and ZAP! Arcs should be visible, however the location of the arcs will be highly dependent upon inter-ribbon spacing variations.
The ribbons will be made of electrical fencing tape (I live on a farm), secured with stiching to a leather or pleather choker. It will fasten in the back with velcro (I know, I know. It's a proto... It was either velcro or zip ties.)