Answer:
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
Some live in me, some live on. And some shave me to stride upon. I rarely leave my native land. Until my death I always stand. High and low I may be found. Both above and below ground.
What has 4 legs in the morning, 2 legs in the evening and 3 legs in the night?
I work when I play and play when I work.
Not a burden for its weight and daily carried out, He who takes it wishes it had never come about
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?