NOAA's Games Planet Arcade offers twenty-five educational games for young students. The games are intended to help students learn about oceans, wildlife, and weather. About half of the games are hosted on NOAA's website and the others are linked to PBS's, National Geographic's or the Environmental Protection Agency's websites.
I played a couple of the games and found that while they are not complex or fancy, they do offer some solid information for young students. For example, the Humpback Whale Migration game isn't much more than a board game that provides students with information about Humpback whales. As students move across the board they are stopped at spaces offering facts about the annual migrations of Humpback whales.
Applications for Education
If you're looking for some simple games to supplement a lesson on oceans, ocean wildlife, or weather, take a look at NOAA's Games Planet Arcade.