PIRA Classification: 8B30.40
Description: A Hoberman sphere (which unfolds from 9.5" to 30") hangs from a pulley and swivel. The sphere is initially expanded and spun slowly. The string through the middle of the sphere is then pulled, collapsing the sphere. The result is a small sphere spinning quite rapidly.
Special Instructions: None
Condition: OK
Setup time: 3 minutes
Safety Issues: None