Two great features of the Theatre Organ are the Traps (untuned-percussions) and Tuned Percussions. This really adds to the orchestral pipe sounds of the Theatre Organ. Tuned percussions and traps make the Theatre Organ sound like you are playing with several musicians.
On a real Theatre Pipe Organ the instruments are real and are connected to the relay and wind supply. These may include a Marimba, Harp, Vibraphone, Chrysoglott, Sleigh Bells, Glockenspiel, Chimes, Xylophone, and Piano.
Traps (toycounter) unit includes many percussions
A Wurlitzer Glockenspiel