This original size Hoberman sphere is a combination of geometry, engineering, and beauty that was specially designed with a super bright nighttime glow. Hang this glowing green sphere from the ceiling and using the pulley, create an expanding mobile that magically unfolds from 9.5 to 30 inches! Also included are the "21 Cool Things To Do" activity sheet and an educational booklet about the geometry of the sphere. 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 L x 10.13 in W x 9.63 in H Material & Care Plastic Spot clean only