I'm not really in the songwriting business, but here's a quick attempt:
🎵
Goodnight, little dreamer, rest your weary head,
Under stars and moonlight, in your cozy bed.
Magic’s in the night sky, whispers of the breeze,
Sleep tight, little one, with ease.
May your dreams be bright and your worries light,
With the gentle night sounds to hold you tight.
Close your eyes, drift away, on a silver stream,
Goodnight, my dear, sweet dreams. 🎵
Does this work, big guy?