Answer:
What can be cracked before it's used?
I have an eye but I cannot see. What am I?
Two in a whole and four in a pair. Six in a trio you see. Eight's a quartet but what you must get is the name that fits just one of me.
I jump when I walk and sit when I stand. What am I?
Package beneath a tree, inside a tasty treat. Keep it for a month, the taste is just as sweet. What am I?
A little house full of meat, no door to go in and eat.