Answer:
Man walks over, man walks under, in times of war he burns asunder. What is it?
I am seen in the water. If seen in the sky I am in the rainbow a jay's feather and lapis lazuli.
I am found in the sea and on land but I do not walk or swim. I travel by foot but I am toeless. No matter where I go, I am never far from home. What am I?
I go up, let out a load and then go back down. What am I?
I am a mini solar powered computer.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.