Answer:
Two bodies have I, though both joined in one. The more I stand still the faster I run. What am I?
I'm a word that's hardly there. Take away my start and I'm an herbal flair. What am I?
I am the same written forward backward and upside down.
I can be cracked made told and played.
David's father has three sons: Snap Crackle and ?
No matter how little or how much you use me, you change me every month.