Viva Pinata

Mix in support for Achievements (attract a certain number of one type of piñata to your garden and you might get a reward, for instance) and the Xbox Live Marketplace (download accessories and outfits, then force the poor piñatas to wear them) and Viva Piñata becomes one of those titles that could touch on everything the 360 wants to do and be. And honestly, watching the demo, the game has promise, regardless of your age - it's a non-violent god-style game with as much or as little micromanagement as you choose.