Book excerpt: At its most basic, philosophy is about learning how to think about the world around us. It should come as no surprise, then, that children make excellent philosophers! Naturally inquisitive, pint-size scholars need little prompting before being willing to consider life's "big questions," however strange or impractical. Plato & Co. introduces children-and curious grown-ups-to the lives and work of famous philosophers, from Descartes to Socrates, Einstein, Marx, and Wittgenstein. Each book in the series features an engaging-and often funny-story that presents basic tenets of philosophical though.