Answer:
What is lengthened by being cut at both ends?
It doesn't live within a house, nor does it live without. Most will use it when they come in, and again when they go out.
What has three feet but no arms or legs?
What stays the same size no matter how much they weight?
What is red and nailed to a wall?
What language does a billboard speak?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?