My three-year old nephew likes visiting to play on my GameCube but finds my game collection difficult (various Star Wars-based games, Shrek 2, Terminator Redemption, etc). I'm looking for a game that would be suitable for him to play with, understandably, minimal violence. What are the "Super Monkey Ball" games like? I have never played those but seen them on sale at Play.com. I notice there is a "Super Monkey Ball" and "Super Monkey Ball 2". Are both games very different to each other, or if I buy SMB2 then I don't need to buy the original as well? Thanks.