It's the original Hoberman toy and it's now a classic and a favorite of kids and adults everywhere. It expands from 9.5 inches to 30 inches in diameter with a magical motion that amazes everyone that sees it. Everyone in the house should have their own because nobody will want to share. All spheres come with a pulley, hardware, and instructions to hang as a cool, kinetic mobile, an educational booklet about the geometry of the Sphere, and a "21 Cool Things to Do" activity sheet. 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 in x 10 in x 10 in Expands from 9.5 in to 30 in diameter Material & Care Plastic Wipe clean with dry or damp cloth