How to Wire a Momentary N.O. Switch to a Battery Operated Device

[deona]

Can anyone tell me how to wire a momentary normally open switch to a battery operated device (4 AA batteries) like this one? http://www.scientificsonline.com/mini-plasma-ball.html

Is it even possible? Any advice appreciated!

 

[pantaz]

Simply insert the switch in series with one of the battery pack wires.
Examples: http://www.1728.org/project2.htm