Answer:
I contain five little items of an everyday sort. You can find all five in a tennis court.
When you stop and look, you can always see me. If you try to touch, you cannot feel me. I cannot move, but as you near me, I will move away from you. What am I?
No matter how hard you hit me, no matter how much I hurt, I'll always go for a laugh. What am I?
I am one with eight to spare, lest I lose my one. I'm not a number. What am I?
Goes over all the hills and hollows, Bites hard, but never swallows.
No matter how little or how much you use me, you change me every month.