18th Riddle, Thursday September 7th 2006 at 16:30 AM (EST)
It's made of grey and white.
It weights between 1 and 1.5 KG.
It cannot feel pain.
Not everyone uses it well.
In fact, we all use it very little.
But one thing's for sure we all need it!
Please dont forget to put your IGN in the pm you send with your answer, and put "riddle" as the title.