Baby Einstein Cal’S Sensory Shake-Up Developmental Activity Rattle Toy, Bpa Free, For Infants Ages 3 Months And UpThe Baby Einstein Cals Sensory Shake up Activity Rattle is a multi sensory toy designed to engage baby in sensory play and encourage developmental milestones. 5 sensory features let baby explore new textures, build fine motor skills, and stimulate cause and effect learning with this BPA free toy. Baby will love to explore the texture of Cals antennae or create some noise by shaking the hourglass beads to create rattle sounds. For cause and effect