Vietnamese children’s music in a bright 2/4 lilt, playful major-key melody with simple repeated phrases and an easy group-sing chorus. Light ukulele strums, handclaps, toy piano accents, and a springy bass; friendly youthful lead vocal with children’s chorus responses. Keep the arrangement clear and buoyant, with a short instrumental pickup, a welcoming verse, a catchy chorus, and a tidy sung ending.