Answer:
What is not a ball but yet a sphere, and holds all lands and people year after year?
Temporary evidence of where you've been strolling
It can be grown in your yard or bought at the store and is given for love when less is more?
What is filled with air and sometimes a gas, tied to a string and often seen on your birthday?
Whipping one of these out in the wrong setting is said to be terrible luck.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?