Answer:
White and thin, red within, with a nail at the end. What is it?
What occurs four times in every week, twice in every month, only once in a year but never in a day?
What instrument plays from the heart?
There are four of these, but everyone's favorite seems to be spades.
It has the biggest wall and is also used when drinking tea.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.