Happy boy
Cheerful lad, joyful youngster, contented child, delighted kid, elated lad, gleeful boy, blissful youngster, satisfied child, thrilled lad, exuberant kid, jubilant boy, ecstatic youngster, pleased child, overjoyed lad, merry kid, elated boy, jovial youngster, euphoric child, radiant lad, delighted kid.
