Answer:
I have keys but no locks. I have space but no room. You can enter but can't go outside. What am I?
I sleep by day, I fly by night. I have no feathers to aid my flight. What am I?
Every night I'm told what to do, and each morning I do what I'm told. But I still don't escape your scold. What am I?
I have wheels and flies yet I am not an aircraft.
I come without being fetched at night, hide away as soon as daylight strikes. Although I may look small, I am much mightier than what you can imagine. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.