Answer:
Roast, boast, coast, post. What do you put in a toaster?
I go around a yard but does not move.
I am the key that is the hardest to turn
Goes over all the hills and hollows, Bites hard, but never swallows.
Why did the computer keep sneezing?
No matter how little or how much you use me, you change me every month.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic