Water mammals are some of the most majestic creatures in the ocean, not to mention highly intelligent. Second graders will be amazed by the water mammal facts they learn through our water mammal science lesson and game. For instance, the heart of one of the largest whales can be the size of small car! Kids will learn several more jaw-dropping facts about marine mammals after interacting with our second grade water mammal game. Upon completing the game, kids will learn the different types of animals that belong to the water mammal family as well as special characteristics of each.