Small, easy to take places, very relaxing, and fun. Great for both kids and adults for: - Stress relief and decompression -People who struggle with anxiety or restlessness - People with ADD/ADHD, autism, etc. - People who enjoy sensory interaction all the time 3D-Printed, Material: PLA Assembled in multiple pieces, the center ball is 2 pieces, there is a visible seam where they meet. Due to the nature of 3D printing, you'll notice some lines or minor variations which add to the unique character to each piece. Each part is printed with environmentally friendly, plant-based PLA. Patent Pending