Get it here: http://itunes.apple.com/us/app/eco-mania/id440503345?mt=8
Eco Mania is a cool little recycling game, where you have to sort different objects coming on the conveyor belt. There are 4 bins: paper, metal, glass and plastic. You, the player have to put the object in the appropriate bin. BEWARE, don't touch non recyclable objects like pizza, bone, etc.
After each game you can see how much on each type of material you saved.
You also have the "Guidebook for a Better World" where you can read useful and interesting eco-tips like: "A plastic bag is used for 15 minutes and disintegrates in 500 years."