green glowing plasma "dripping" sphere hovering and then disapating over my little sisters head as she slept. It was her birthday. I wi

I was 12 years old, when I witnessed in mine and my siblings shared bedroom, a silent, pulsing, neon grass green, floating orb/ball of light that dripped some big "blobs" of itself (that dissolved in the air). About the size of a basketball. I was about 12 feet away from it as it hovered above my sister's head as she slept. Her face had a pale bright green glow and I could see she was asleep and unaware of the object. I could not move, however I was wide awake and not really scared but more fascinated. I have thought of this a million times in my life (66 now)and the memory does not change. I will take a lie detector test or whatever but no matter what, I know what I saw.