sprightly

Fluent, conversational, ever polished, he is full of happy turns and of Gallic sprightliness.

There was no system or connection in what she taught, but the sprightliness of her delivery made up for the defect.

He had youth without diffidence, sprightliness without wit, opinion without judgment, and learning without knowledge.

Indeed, there is nowhere else fun so keen, humor so exquisite, or sprightliness so enchanting.