This is a carved Lego head inspired by "How to hack LEDs into Lego minifigures for Halloween".

http://www.evilmadscientist.com/article.php/LEDMinifigs

I hand drilled 11 holes in the head and then put the it to a knife.  There is a 5mm yellow LED in the head, and I have bent the wires though holes in the torso to a lithium battery that is taped on the back.