Cassie Cal, a bipedal robot developed by the UC Berkeley Hybrid Robot Lab, looks like an ostrich leg. Independent form of left and right, as well as roller skating, etc. are continuing to evolve. But this time, it is said that this cache is only one ball, but it is possible to juggle.
According to the video description, what Kathy is juggling is multitasking, which simultaneously performs two tasks: accurate and balanced. In addition to the racket, Kathy uses a motion capture system to track the position of the ball and juggle it so that it does not fall even when using wooden boards or plastic blocks printed on a 3D printer. Related information can be found here .