Answer:
What is it that you ought to keep after you have given it to someone else?
Usually green but can be brown. It's a great place to play or lie down. What is it?
What is it that after you take away the whole, some still remains?
What do you have in December that you don't have in any other month?
People in love are often bound to this.
I am a room that has a roof but no walls. What am I?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?