Did you know there's enough energy in your pinky finger to power an entire city? And that everything you do—running, jumping, playing, and exploring—is all powered by that same energy inside of you? In a companion to the acclaimed A Hundred Billion Trillion Stars, Seth Fishman and Isabel Greenberg explore the relationship between energy and the human body, making complicated concepts understandable. Isabel Greenberg's vibrant illustrations are the ideal match to Seth Fishman's engaging, playful text. Perfect for curious, energetic kids and for classroom learning.