Awesome fun to be had with a switched off iPhone !!!
The Sprinkle oil - Trinkle madness idea:
iPhone's got an awesome glassy 3.5 inch screen. Not much use powered off ?! Think different. Rub a little oil over the screen (tip - there is always some oil left in your forehead n nose :P) and then the magic begins.
The glassy screen coupled with the oil immersion makes the screen a perfect slate !! You can write anything you want with your finger n tilt the phone to get a good angulation with a light source and see your writings sparkle in a thousand different colors against the black screen !! (Should I patent this awesome idea ?!)
Your name, her/his name with a heart arrow symbol in the middle - you can keep on looking at it in different angles & different colors and you will never think about charging your iPhone ever :