Answer:
I am black when you buy me, red when you use me. When I turn white, you know it's time to throw me away. What am I?
I go around in circles but always straight ahead never complain no matter where I am led. What am I?
I work when I play and play when I work. What am I?
You can never eat me for breakfast or lunch. What am I?
I am black within and red without; with four corners round about. What am I?
A little house full of meat, no door to go in and eat.