Answer:
Twigs and spheres and poles and plates. Join and bind to reason make.
Although my cow is dead, I still beat herΒ What a racket she makes.
Big as a biscuit, deep as a cup, but even a river canβt fill it up. What is it?
My teeth are sharp, my back is straight, to cut things up it is my fate.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.
People take me on walks and I run and have fun. What am I?