Oball Flex & Stack Balls 3 Piece Nesting Stacking Sensory Toy Set Multi 0m+ Brightly colored Oball Flex & Stack Balls offer versatile sensory play for infants aged 0 months and up. These three flexible balls feature the signature easy-to-grasp Oball design, allowing little hands to easily hold, roll, nest, and stack them. The collapsible design makes them perfect for on-the-go entertainment and compact storage. Each ball comes in a vibrant multi-color scheme including red, orange, yellow, green, and blue, stimulating visual development while encouraging fine motor skills through tactile exploration.