Complex sentence: Perhaps the most impressive of the early Audio-Animatronics efforts was The Enchanted Tiki Room, which opened in 1963 at Disneyland, where a room full of tropical creatures synchronize eye and facial action with a musical score entirely by electromechanical means.
Split into simpler sentences: Perhaps the most impressive of the early Audio-Animatronics efforts was The Enchanted Tiki Room, which opened in 1963 at Disneyland. It was (and is) a room full of tropical creatures with eye and facial actions synchronized to a musical score entirely by electromechanical means.