Answer:
What you do to determine the length of something
A crafty use of long pieces of wool to make a scarf.
If you are unsure how to use one then just ask a flight attendant.
Tear one off and scratch my head, what once was red is black instead!
Once you know it exists, it no longer exists. What is it?
I tell people to be careful when handling boxes.
Easy
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?