Ferrie delivers a cleanly designed introduction to how matter and energy interact on an atomic level; he begins with a recognizable blue ball, set against a white background, then goes deep. -All balls are made of atoms,- he writes before lightly touching on the particles within atoms, the energy they possess, and how it is absorbed or released. It-s unclear, though, how much children will themselves absorb: -This energy is quantized,- reads one page, but no explanation of the term is given, and the accompanying image (of three charged electrons) is identical to one used earlier to highlight the idea that -All electrons have energy.- Simultaneously available: General Relativity for Babies, Newtonian Physics for Babies, and Rocket Science for Babies. Up to age 3. (May)