Book excerpt: In a series of fun and involving hands-on physics experiments, kids learn how airspeed affects flight, how unbalanced forces produce motion, how polarized light moves, how to separate light into colors, and how a mirror affects the reflected image. They will also determine and demonstrate why popcorn pops, how temperature affects the bounce of a rubber ball, the effect of solids on the speed of sound, and how the length of a flute affects the pitch of the sound it produces. Featuring color illustrations and safe, simple step-by-step instructions, Janice VanCleave again shows just how much fun science can be.