Answer:
I have Eighty-eight keys but cannot open a single door.
Alone I am 24th with a friend I am 20. Another friend and I am unclean.
I move without wings, between silken strings. I leave as you find my substance behind. What am I?
If you look, you cannot see me. And if you see me, you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. What am I?
Iron roof, glass walls, I burn and burn but never fall. What am I?
I am owned by Old McDonald.