Answer:
They keep secrets locked away. And you pass through them each day. For each one there is a key, They respond to sesame.
What instrument can you hear but never see?
What goes up and down the stairs without moving?
There are 7 birds in a tree. A hunter shoots one bird down. How many birds are left in the tree?
The more you look at it, The less you see.
I am a room that has a roof but no walls. What am I?