Answer:
What never ends but you always have it
I am a man but I swing from place to place and walk upside down just like a critter. Who am I?
What can an elephant and a shrimp both be?
If four people can repair four bicycles in four hours, how many bicycles can eight people repair in eight hours?
Small and bearded, both in the real world and in stories.
I am the same written forward backward and upside down.