Answer:
What loses its head in the morning but gets it back at night?
I am an instrument you can hear but cannot touch or see. What am I?
Canine children.
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat and your heart grow cold. I visit the weak, but seldom the bold. What am I?
the only amusing part of the body
Give it food and it will live, give it water and it will die.