Answer:
I am the only thing that always tells the truth. I show off everything that I see. I come in all shapes and sizes. What am I?
You throw away my outside, you cook my inside. Then you eat my outside and you throw away my inside. What am I?
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
I'm really blue but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt.
I go up when the rain comes down
The answer I give is yes, but what I mean is no. What was the question?