Meet the Hoberman Sphere – the mesmerizing toy that expands and contracts like magic! With endless play possibilities, it can be thrown, bounced, kicked, spun, rolled, or hung from the ceiling. The package includes an educational booklet, a 21 Cool Things To Do activity sheet, a pulley, and hanging hardware, turning it into a kinetic energy mobile. From a compact 9.5 inches to an impressive 30 inches, it's the perfect toy for ages 4 and up. Get ready for hours of enchanting fun! Choking hazard-not for chilrden under 3 years.