An awesome activity that really helps kids understand how blubber works, and how marine mammals can stay warm in cold water. Kids are able to physically feel the difference that blubber makes and how affective it is. This activity is also great because you can easily do it with common household items that you already have in your kitchen. The accompanying video is fun and offers good insight on how various animal in the polar regions stay warm. But the host does talk very fast, so listen closely.