Answer:
I sleep when you are awake, I am awake when you fall asleep. I can fly but no feathers to aid my flight. What am I?
I am of several different kinds, but the one you pick doesn't do its job. What am I?
Goes over all the hills and hollows, Bites hard, but never swallows.
What always goes to bed with its shoes on?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.
I go in hard, come out soft. Blow me hard and I'll make a pop. What am I?