a twinkling star

My little grandson turned five in June.
I remember when my daughter and son-in-law told us that he was on the way.
It was December and they handed me a small flat package, an early gift, they said.
"Music," I thought, smiling. Inside was a CD cover that contained a slip of paper.
Was it a ticket?
The printing was very dark.
"Why can't I read a thing anymore," I thought, squinting.
My other daughter had joined us and was looking over my shoulder.
Suddenly she joyously gasped. "An ultra sound. It's an ultra sound."
"Ultra sound? An ultra sound? But.... that means they're going to have a baby? " I thought, feeling suddenly very light headed.
"We got to see the screen," my daughter enthused. "There was a heart beat and a little flashing light," she added.
"My grandchild is a little flashing light," I thought, my mind swirling. "Like a star, a twinkling star."