What is Twinkle ?
Twinkle is (noun) a little glitter There was a twinkle in his eyes as he gave her the present. Synonym sparkle (verb) (of stars or eyes) to shine with a little moving light His eyes twinkled as he showed the children the sweets he had bought. We could see the lights of the harbour twinkling in the distance.
source: Easier English, Student Dictionary Upper Intermediate Level