This set includes two interactive books, each featuring six double-sided pages with touch-sensitive pictures that activate vocabulary words, sounds, and music. The 100 Animals Book introduces animals from 12 different habitats and environments, while the 100 Words Book covers 12 word categories, including colors, foods, activities, opposites, and outdoor themes. Each page offers three play modes: Read Aloud, Sound Effects, and Fun Facts. The books are fully bilingual, allowing children to hear words and songs in both English and Spanish. Designed for ages 18 months and up, the set requires 4 AA batteries (included for demo purposes only; new batteries recommended for regular use).