Answer:
Old Mcdonald had this
They keep secrets locked away. And you pass through them each day. For each one there is a key, They respond to sesame.
Seven brothers, five work all day, The other two, just play or pray.
You can have it, and be at it, But it never lasts forever.
What goes through a door but never goes in and never comes out?
If I say "everything I tell you is a lie", am I telling you the truth or a lie?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?