The Discovery Communications lobby boasts an audio kinetic ball machine by George Rhoades. This Rube Goldberg-like contraption has bouncing balls, ringing bells, moving gorillas, video screens, and whirl-i-gigs galore. Kids will love the weirdness and parents can’t help but track the progress of the machine. It is a sensory overload that is worth the trip. Visitors must sign in at the front desk for admittance.