Opus stack&stream sensory stacking cups opus stack&stream sensory stacking cups the opus stack&stream sensory stacking cups by baby einstein are the perfect toy for stores looking to offer versatile sensory developmental toys. This five-piece set consists of large nesting cups and a shell-cap water sprayer which together offer endless possibilities for both water and floor fun. The colorful cups are ideal for little hands and have a texture that makes it easy for babies to grasp stack and explore. Discovery and fun with opus stack&stream sensory stacking cups the opus stack&stream sensory stacking cups are designed to help babies develop cause and effect. The purple shell-cap water sprayer provides extra sensory fun while opus the octopus changes color in warm water creating a magical effect. This enhances visual and tactile exploration for your little ones. For water and floor fun these stacking cups are not only ideal for water fun but also perfect for floor play. Made of sturdy plastic the opus stack&stream sensory stacking cups are suitable for babies from 3 months. The toy stimulates the senses promotes fine motor skills and provides long-lasting fun for young children. This product is a great addition to the assortment of toy stores both online and offline. Key features of the opus stack&stream sensory stacking cups: 4 large nesting cups and a shell-shaped lid; water sprayer for color texture and sensory exploration; opus the octopus changes color in warm water for extra visual stimulation; stimulates cause and effect fine motor skills and sensory learning through stacking pouring and nesting; ideal for water fun with slots to let water flow; dimensions: largest cup 10.4 x 8.8 x 15.2 cm; cups nest for easy storage and are easy to clean.