The Baby Einstein Ocean Explorers Go Opus Go 4in1 toy features 4 modes Tummy Time Sit Play Chase and Dance grows with babys physical and cognitive needs from infant to preschool Baby can learn numbers shapes colors and opposites with Opus Reinforces gross and fine motor skills listening skills and cause effect learning 150 songs and phrases in total During Tummy Time mode touch an arm to see Opus light up spin and play Feeling Curious In Sit Play mode older infants will delight as Opus teaches shapes and numbers and plays Still Learning Sensor detects objects allowing Opus to run away from babies and toddlers in Chase mode In Dance mode Opus plays the hit song The Jellyfish Wiggle For ages 3 months to 5 years Eight plush arms respond to babys slightest touch Features 4 songs from Baby Einstein Ocean Explorers YouTube series with volume control Requires 3 AA batteries Dimensions 94 x 94 x 90 inches