This transparent stick filled with colorful beads is a popular instrument that babies are said to stare at in fascination as the beads cascade down when flipped, creating a mesmerizing sound and movement. It's even used by pediatricians before giving vaccinations. The instrument's roots are in a wooden instrument from Chile. The way the beads fall is precisely calculated and designed so that babies can follow them with their eyes. Flipping it quickly creates the sound of rain, while tilting it slowly produces the sound of waves, allowing for various sounds depending on how it's shaken. Please close your eyes and listen to the sounds. Shaking it sideways with small movements can produce the authentic sound of a shaker. The cylindrical shape also makes it fun to roll around. For practicing crawling and rolling over, you can move it little by little to a spot just out of reach, encouraging that "one more step" of movement in a fun way. This instrument was developed by an Israeli instrument maker who wants children to enjoy music safely from a young age.