What is the name of the plastic sphere that, when pulled apart, makes a big open sphere?

Question

it's usually found at science centers. It's small, and when you pull on any two parts, the whole thing expands into a bigger structure. It's basically a bunch of interconnected arms that work in tandem to expand.

Answer 1

a hoberman sphere?

Answer 2

The Hoberman Sphere. Invented by Chuck Hoberman.