Answer:
I go up and down at the same time. Up towards to sky and down towards the ground
Of the king I am blue and of the peasant I am red. Of the frog I am cold and of the dog I am hot instead.
The 8 of us go forth and not back to protect our king from a foe's attack. What am I?
What force and strength cannot get through, I with my unique teeth can do. What am I?
If you drop me I'm sure to crack but give me a smile and I'll always smile back. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.