If you go to The Dock, there is a HUGE stage. If you have the All Access Pass, go to the little opening in the curtain. To the left of Backstage, a bunch of old instruments are back.
Where I circled the top of the i, if you click on it, you get the snare drum and drumsticks. Where I circled the o, if you click on it, you get the black electric guitar. The Cowbell is played by click w really fast without having the cursor on the chat bar. The Cowbell, Trombone, and Double Necked Guitar are new items.