The Hoberman Sphere is a geometric contracting ball linked by plastic struts made with a marvel of mechanical engineering. The Original Hoberman Sphere Rings has linking rings of color that magically expand from 9.5 to 30 inches. You can hang it from the ceiling and using the pulley, create an expanding mobile that you can open and close. Includes 1 Expanding Sphere, Pulley, Instructions Recommended for 1 player, ages 4 and up WARNING: CHOKING HAZARD - Small parts. Not for children under 3 years of age Made in China Imported Product Specifications Package dimensions: 10.13 in x 10.13 in x 9.63 in Material & Care Plastic Spot clean only