Answer:
What goes around the wood but never goes into the wood?
I come without being fetched at night hides away as soon as daylight strikes. Although I may look small I am much mightier than what you can imagine.
I help engines spin and pants stay up.
I work when I play and play when I work
Two bodies have I, though both joined in one. The more I stand still the faster I run. What am I?
My first is snapping, snarling, growling, My second's industrious, romping, and prowling. Higgledy piggledy Here we lie, picked and plucked, and put in a pie.