This wall panel when turning the blue disk, a rustling and trickling sound can be heard. No, its not raining, its the unique noise it makes. Watch the clouds roll by! The Sensory Wall has a variety of elements that provide many different sensory experiences. They engage these senses - sight, touch, hearing - as well as a sense of physicality. After exploring and understanding, children start to describe their experiences. When children express their experiences in words, they develop good language skills. Base panel made of birch veneer with child-safe stain.