Answer:
What an fill a room but takes up no space?
Two in a whole and four in a pair. And six in a trio you see. And eight's a quartet but what you must get. Is the name that fits just one of me?
I have one eye. See near and far. I hold the moments you treasure and the things that make you weep.
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
What is neither inside the house nor outside the house but a necessity for any home?
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?