The Hoberman sphere (Larger Version) is a complex design consisting of dozens of pivot points and 12 quad connecting joints. The sphere expands and compresses in 3 different dimensions. This expanding ball is fully functioning and ready to use right from the printer (No Assembly Required).
Opens to approximately a 22 cm diameter.
NOTE: Design has purposely used a minimum amount of material while still remaining fully functional and rigid. The same amount of material used in this expanding sphere with a diameter of approximately 22 cm.