- "This thing is amazing! I mean the magnetic-propulsion alone would advance Earth science by decades."
"Uh, Jane?"
"I am so taking this apart."
"Jane?"
"What?"
"You have their ball."
"Oh." - ―Jane Foster and Thor[src]
Magnetic Propulsion Balls are toys used by Asgardian children.
History[]
Jane Foster strolled around the city of Asgard and was captivated by the motion of the ball, accidentally taking it from the children who were playing with it. Thor pointed at what she had done, and Foster returned the ball.[1]