Crawl, dance, chase, and learn with the Baby Einstein Ocean Explorers Go Opus Go 4-in-1 Crawl and Chase Activity Toy. This motion-activated toy grows with child from baby to preschool with 4 modes of learning and fun to inspire musical exploration, number & shape learning, sensory discovery, and movement. Opus comes alive and plays 4 songs from the new Baby Einstein Ocean Explorers series - “Octopus Hide & Seek,” “Feeling Curious,” “Still Learning,” and the “Jellyfish Wiggle”. Touch a soft arm in Tummy Time Mode to see Opus light up, spin, and sing. In Sit & Play Mode, baby can learn numbers, colors, and shapes as Opus spins. In Chase Mode, Opus moves away from baby or toddler by sensing obstacles, encouraging crawling or walking to catch Opus. Once caught, he rewards with 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.