Answer:
I help you carry your books.
I walk on 4 legs in the morning 2 legs at noon and 3 legs at night.
What is easy to get into but hard to get out of?
I have an eye but am blind, a sea, but no water; a bee, but no honey; tea but no coffee; and a why, but no answer. What am I?
My rings are not worth much, but they do tell my age. What am I?
When is it bad luck to see a black cat?