Answer:
What speeds on a track but isn't in a race and has a whistle to announce its steady pace?
I travel with deer all over the world and make the night special for all boys and girls. I happily drink milk and eat your cookies and then I give you all sorts of goodies. Who am I?
It's real until the trick is revealed.
What can you blow up and keep intact?
You can find me inside your body but not below the waist or in your tummy. I am located in the upper part and I am a symbol of love.
I appear in the morning. But am always there. You can never see me. Though I am everywhere. By night I am gone, though I sometimes never was. Nothing can defeat me. But I am easily gone.