Food Force

The United Nations World Food Programme has released Food Force, a 3D educational game to teach 8-13 year old children about world hunger.

From the web site:

The game itself consists of six missions. Each mission begins with a briefing by one of the Food Force characters, who explains the challenge ahead. The player then has to complete the task - in which points are awarded for fast and accurate play and good decision making. Each mission uses a different style of gameplay to appeal to children of all abilities. Each mission represents a key step of the food delivery process - from emergency response through to building long-term food security for a community. Following each mission a Food Force character returns to present an educational video showing the reality of WFP’s work in the field. This allows children to learn and understand how WFP responds to actual food emergencies: Where food originates, the nutritional importance of meals, how food is delivered and how food is used to encourage development.

Players can even compete for high scores online.

It's a whopping 200MB-ish download, but it apparently contains a lot of 3D and video. The web site includes lesson plans and other information for integrating the game into the classroom.