Answer:
If you are to keep it, you must first give it to me. What is it?
Ch side by side, you are inside.
What has many keys but cannot open a single lock or door?
We are two brothers on opposite sides of the road, but we never see each other. Who are we?
What is filled with air and sometimes a gas, tied to a string and often seen on your birthday?
I am a room that has a roof but no walls. What am I?