Mario Kart racing: name says it all
Life Size Mario Party: Players roll a virtual die, use virtual effects,m and try to win a prize or something at the end
Luigi's Mansion: One of those dark houses where you're given a lazer gun and see how many ghosts you can "kill"
Mecha Bowser Roller Coaster: from super mario sunshine
E-Gadd Gift Shop: Life Size FLUDD squirt gun with catch phrases, Wind-Up bob-ombs and mecha bowsers, Mario Hats, etc.
Bowser Jr./Shadow Mario Face Painting
Arcade: Waluigi Pinball, Whack-a-Goomba, FLUDD-fill-up-the-balloon race thing, etc.
Piniata Hotel nearby for guests that wish to stay for longer than one day
Pipe Maze for the kids
Life-Size Donkey Kong Barrel Game
Wonky (from TTYD) Information Booth
Donkey Kong Jungle Gym
King Boo's Casino where you use coinds instead of chips. Games could include Yoshi races, SSB boxing matches, and Luigi Card Games from SM64DS