Answer:
The thinkers usually hold this body part
What has no hands but might knock on your door, and if it does you better open up?
Without this, H2O would just be 2O
What starts with a T ends with a T and is full of T?
I have eighty-eight keys but cannot open a single door? What am I?
When is it bad luck to see a black cat?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?