TWINKLY

beamish, smiling, twinkly

(adjective) smiling with happiness or optimism; “Come to my arms, my beamish boy!”- Lewis Carroll; “a room of smiling faces”; “a round red twinkly Santa Claus”

Source: WordNet® 3.1

Etymology

Adjective

twinkly (comparative twinklier, superlative twinkliest)

that twinkles

Source: Wiktionary