What is the name of the deltoidal icositetrahedron toy?

There's a toy that used to be popular. You can typically buy them in souvenir shops at science centers (like the Liberty Science Center). Its shape is a deltoidal icositetrahedron and it expands from a small deltoidal icositetrahedron to a larger one when you pull the the opposite sides of it. I can't figure out what it's called. Google isn't working out. Anyone know?|||Are your talking about a Hoberman Sphere? This is an expanding sphere toy that goes from 9" to 30" when you pull on the opposite sides of it. (I don't know it is has 24 sides.)