Answer:
I hide but my head is outside. What am I?
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 am a pretty one, fluttering in the pale blue sky. Delicate, fragile on the wing, indeed I am a pretty thing. What am I?
I can be hairy and itchy all over. I can be the scariest thing you have ever seen. I stand in the middle of nowhere, hanging on a stick. What am I?
I am an object which is used in baseball during the day I can't be seen at all
Why is the letter B always cool?