Breathe deep and prepare to sail like the wind, with the sweetest puff of air in all the atmosphere--part of the Science Pals series, including Drop: An Adventure through the Water Cycle and Ray: How Light Works Look who just blew in! Meet Puff. He's air. And he's a gas! Puff has been here for billions of years, forming a blanket of protection around Earth to hold in heat and keep out cold. Puff is key to life--he's the air we breathe and the wind around us. And he's got talent! Have you ever incinerated a space rock? Traveled from the highest heights to the deepest depths of the sea? Or spun through a tornado? Puff has! He'll tell you all about it. With refreshing wit and breezy one-liners, Puff takes readers on an airy adventure through the atmosphere, earth, water, and you. Filled with irresistible artwork, funny asides, and a gentle current of kid-enticing facts, plus endpapers that reveal even more of what air is and how it moves, Puff is the breath of fresh air we've all needed. "Fresh and breezy." --Kirkus"Cheerful [and] easy to understand." --Booklist