This is inspired by a friend of mine, an anxious college senior among many other, who always carries at least two stress balls with her. Everyone needs some spontaneous happiness once in a while.
One walks into a balloon-lit (inspired by the shape-shifting lamp) room sad. The ballon and the string are of pneumatic properties. He tries to catch the string on the balloon to cheer him up. The motion of jumping can increase the length of the string attached.
He can make the balloon into a yoyo and play with it. Again, the length string of the yoyo can be changed by the motion and force exerted on it. The yoyo now has harder texture.
And if he really wants, he can reshape the yoyo into a stress ball with a key chain and keep it in his pocket. The texture is softer than the yoyo but stiffer than the balloon.
