This document discusses the eight kinds of fun in games: sensation, fantasy, narrative, challenge, fellowship, discovery, expression, and submission. It provides examples of how different games emphasize different aspects of fun, such as Quake emphasizing challenge, sensation, competition, and fantasy, while The Sims emphasizes discovery, fantasy, expression, and narrative. The document then discusses three passes of designing a babysitting game with a tag mechanic for different age groups, starting with ages 3-7, then 7-12 year old girls with more challenge, and finally a military simulation version for 14-35 year old men.