Development of baby sensory organs, easier to explore the ball shape and colour.Sensory balls soft balls: a variety of colours to capture the critical phase of visual development and train the baby's visual perception development.Skill development: mastering, vision, interest training, senses, listening, development of other skills, parent-child communication, hand-eye coordination, interactive toy.Specification:Color: MulticolorMaterial: PlasticSize: about 5.5cm-7cmPackage List12pcs Sensory Balls Soft BallsDue to the different monitor and light effect,the actual color maybe a slight different from the picture color. Please allow 1-2cm differs due to manual measurement. 1Safe material: Including 12 pieces baby sensory balls. All pieces are made from high quality TPU soft glue materials. The balls are soft, lightweight and feature smooth edges, burr-free, which does not hurt your little ones hand. No allergies and irritation of the human body. Baby is safe to play. 2 Skill development: soft and textured material with 10 different sizes and shapes that encourage the baby to achieve sensory play, beat, grasp and enjoy the baby&39;s touch becomes a critical phase for the rapid development of sensory development. 3 Soft color: the ball uses soft colours to attract baby&39;s attention. Allows babies to be exposed to rich colours. It is a great learning toy for 0-12 months children. 4 Pleasant voice: each pad is perfect in size. Perfect for small children to play and train with their baby&39;s grip skills. Built-in sound device, and it will make a sound when squeezed, attractive and fun for children and adults. 5 Sensory balls soft balls: the tactile sensation creates a structure with raised points that stimulates the different structured skin structures of the baby. They are used and are perfect for training the brain, activating imagination and creativity, improving memory and other cognitive skills.