Answer:
Two brothers we are, great burdens we bear. All day we are bitterly pressed. Yet this I will say, we are full all the day, and empty when go to rest.
With sharp edged wit and pointed poise. It can settle disputes without making a noise.
Hard to catch, easy to hold. Can't be seen, unless it's cold.
I can be cracked, I can be made. I can be told, I can be played.
Twigs and spheres and poles and plates. Join and bind to reason make.
I am the kind of an ant that's good at math. What am I?