Tiny bits of light or sparks.
Scintillae can make people think of stars, fireworks, or magic.
Examples:
The night sky is full of scintillae.
The campfire sent scintillae into the air.
The scintillae from the fireworks lit up the sky.
The scintillae danced in the dark sky.
Her dress was covered in scintillae that sparkled in the sun.
The scintillae from the magic wand filled the room.