Crawl, dance, chase, and learn with the Baby Einstein Ocean Explorers Go Opus Go 4-in-1 Play & Chase Pal. This unique, motion-activated toy adapts as baby grows with 4 modes of learning and fun to inspire musical exploration, number & shape learning, sensory discovery, and movement. Opus comes alive and plays songs from the new Baby Einstein Ocean Explorers series in every mode. Touch a soft arm in Tummy Time Mode to see Opus light up, spin, and sing. In Sit & Play Mode, baby can learn numbers & shapes as Opus spins. In Chase Mode, 3 chase patterns challenge baby to crawl or walk. Catch Opus to hear a celebratory song! Dance Mode brings the party to all ages as Opus teaches opposites and plays music. Appropriate for ages 3 months to 5 years.The Baby Einstein Ocean Explorers Go Opus Go 4-in-1 Play & Chase Pal is an interactive playmate that grows with baby’s physical and cognitive needs from infancy to preschool. Baby can learn numbers, shapes, and opposites with Opus. Also reinforces gross and fine motor skills, listening skills, and cause & effect learning. Dimensions: 9.43 x 9.43 x 8.42 inches 4 modes – Tummy Time, Sit & Play, Chase, and Dance – to meet baby’s play and learning needs as they grow from crawling to sitting to walking to dancing. Features 4 songs from Baby Einstein Ocean Explorers series – “Octopus Hide & Seek,” “Feeling Curious,” “Still Learning,” and the “Jellyfish Wiggle”. 100+ songs in total! Soft, plush arms respond to baby’s slightest touch. Motion sensor lets baby chase Opus during crawling or walking. Features volume control. Requires 3 AA batteries. For ages 3 months to 5 years.