Its a Holybabyjeezus Light Stick. Just snap and shake...instant softly glowing Messiah.
It's the baby Jesus from a fourty year old 'uranium glass' nativity scene? Seriously, look up uranium glass, it's real.
It looks like a baby doll set up like a glow worm...
Kewpie Doll Baby Jesus night light.
Nuclear Dairy Whip cone from Indiana?
Nuclear, light up your life, omg glowing baby Jesus on a stick.
Soap on a rope to cleanse your soul
Either it is a baby Jesus, or it's holding a baby Jesus. Or possibly both?
I would say glow stick too, but you mentioned that it actually has a purpose. I'm stumped, a phone charm or zipper pull?
The light on the lamp post outside the pearly gates. If it's green, you're in!
Is it a radioactice soap on a rope? Does it wash your sins away?
A baby Jesus Kewpie doll night light (in a rather fashionable alien-green color)
It's like those fish with the glowing ball in Nemo, only for REALLY religious collectors of Kewpie dolls. It's what's in the dark that's really scary.