I decided to make an opera glove with some embedded circuitry. The electromagnet is in the index finger of the right hand; the electromagnet (and also the on-Arduino LED for pin13) are on while the red button is held down; there are sensors made of conductive thread on the palm and pad of the ring finger which, when touched together, disable the electromagnet while the button is still held down (but the LED stays on).
MagnetoGirl's powers are a bit weak right now, though- her glove still has to be plugged in to the laptop for power! Improvements welcome.
Step 1: Materials
-alternately, a pre-made glove, and then you can skip the next step
-Lilypad Arduino & USB cable
-conductive thread & needle
-2 high-resistance resistors (for tie-downs)