Answer:
The more you add the less it weighs. What is it?
My voice is tender, my waist is slender and I'm often invited to play. Yet wherever I go, I must take my bow or else I have nothing to say. What am I?
I come with a train and go with a train and the train doesn't need me but can't go without me.
A large oasis in the desert. Come with cash and leave with none. What am I?
I go around a yard but do not move. What am I?
When is it bad luck to see a black cat?
What am I?
Animal
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Food
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Logic