Kids Riddles

Question: Two children are born in the same hospital, on the same year, on the same day, and have the same father and mother. But they are not twins.

How is this possible?

Question: I run over fields and woods all day. Under the bed at night I sit not alone. My tongue hangs out, up and to the rear, awaiting to be filled in the morning.

What am I?

Question: Why did the chicken cross the road?

Question: I give advice to others,
yet I know nothing myself.
I am a hitchhiker destined to stay still.

Question: There are two sisters: one gives birth to the other and she, in turn, gives birth to the first. Who are the two sisters?