twinkle - noun

a rapid change in brightness; a brief spark or flash

merriment expressed by a brightness or gleam or animation of countenance

twinkle - verb

• gleam or glow intermittently
• emit or reflect light in a flickering manner

twinkle - thesaurus

blink   flash   light   scintillate   scintillation   spark   sparkle   sparkling   wink   winkle