Answer:
I have a little pool with two layers of wall around it. One white and soft and the other dark and hard. Amidst a light brown grassy lawn with an outline of a green grass.
With three leaves, I am just a plant. Add another leaf and everyone will want me for good luck. What am I?
You cannot keep me until you have given me. What am I?
Only one color, but not one size, stuck at the bottom, yet easily flies. Present in sun, but not in rain, doing no harm, and feeling no pain. What am I?
The 8 of us go forth and not back to protect our king from a foe's attack. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.