Formal & Elegant:
* Diversion: Implies a pleasant distraction from routine.
* Amusement: Suggests lighthearted entertainment or enjoyment.
* Merriment: Highlights a joyful and lively atmosphere.
* Entertainment: Focuses on activities designed to provide enjoyment.
* Recreation: Highlights activities done for pleasure and relaxation.
More Informal & Playful:
* Jolly: Expresses lighthearted and good-natured fun.
* Jovial: Suggests a cheerful and festive atmosphere.
* Spirited: Implies energetic and lively fun.
* Delightful: Emphasizes the pleasant and enjoyable nature of the experience.
* Exhilarating: Conveys a sense of excitement and thrilling joy.
Ultimately, the best word will depend on the specific context and the tone you want to convey.