This Instructable is a tribute to the following great Instructables:
Cat Burglar Joule Thief
Give the gift of Robot Invasion
and to the simple fact Instructables are great source of inspiration.
At Evil Mad Scientist you can find a circuit diagram and an explanation on how the joule thief actually works. Another explanation on this blocking oscillator (more correct according to some) can be found here.
When making the cyborg zombie in a workshop with children you should do some of the steps in preparation depending on their age and experience. For 6-year-olds I do step 2 to 4 in advance. More experienced young builders can do it all by themselves.