Answer:
There is one in every corner and two in every room.
My keepers feed me colored balls. With sticks they store on my den walls. Sometimes I store them in my pouch. Sometimes deep in my belly; ouch!
I am a key that is playful. What am I?
I have two eyes in the front and a lot of eyes on my tail. What am I?
A man who was outside in the rain without an umbrella or hat didn't get a single hair on his head wet. Why?
No matter how little or how much you use me, you change me every month.