My parrots organized a rock band.
First, a parrot beak beginning to pull the bars. I get sound. He liked. Continue.
Over time, I began to pull a row for several rods in different places and get sound a different tone.
And pinching them in a certain sequence and it goes something like music. Soon joined the remaining parrots (and I have them in a cage 6 pieces) One pulls the bars (such as stringed instrument) second knocking trough on the bottom of the cell (this is their drummer) and with the rhythm of knocking, the third, something pops and clicks (which is a tool, and shows what produces such sounds did not understand), fourth, rings the bell, and two others simply perform a solo.
Now a concert every day and even at night. Maybe buy them a synthesizer?