s is not a typical stack-and-nest toy. The weirdly-shaped pieces can be stacked and arranged any way you want. The vibrant colors are fascinating and the unique contours are inspiring! But then, nest them together, pull up on the smallest, and let your jaw drop. The whole thing stretches into a tall, spiraling tower, like magic! Beautifully un-intuitive design inspires hours of tactile discovery. Encourages fine motor skills, spatial reasoning, experimentation and creativity. Includes nine cylinders in assorted sizes, the largest measures approximately 4" in diameter. When stretched into a tower, the entire structure measures 22" tall. High quality, ABS plastic is BPA-free. For ages 3 and up.