u003cbu003eNow available in Spanish bilingual editions, this best-selling series offers big, brainy science for the littlest listeners.u003c/bu003eu003cbru003eu003cbru003eAccurate enough to satisfy an expert, yet simple enough for baby, this clever board book explores the ups and downs of gravity. When baby drops food from a high chair, why does it fall? Beautiful, visually stimulating illustrations complement age-appropriate language to encourage baby's sense of wonder. Parents and caregivers may learn a thing or two, as well!