For the uninitiated, the often elaborate world of 3-D hobby gaming can seem intimidating. Fortunately for interested onlookers, there's a relatively simple way to join the fray: the KC Game Fair (1601 North Universal Avenue, in the Intrigue Park Place Hotel, 816-483-9900). Board games, miniature war games, role-playing games and more will be available for players of all experience levels for four days straight. Demonstrations will help introduce players to new games, along with panels and special events featuring experienced gamers and industry pros. The all-ages fair is open noon to midnight today, 8 a.m. to midnight Friday, 8 a.m. to 1 a.m. Saturday and 8:30 a.m. to 6:30 p.m. Sunday. Four-day badges cost $20; single-day admission is $5 on Thursday, Friday and Sunday or $10 on Saturday. For more information, see kcgamefair.com.