Kids Riddles

Question: I join you in battle, fist clenched tight.
We pound three times with all our might.
If my rival decides he will sign for peace;
I'll crush him, and the fight will cease.
But if he lays his hand down flat;
I'll suffer defeat, that is that.

What am I?

Question: A farmer has three fields. One of them has 3 bundles of hay, another has 4, and the last has 5. How many would he have in the first field if he combined all of them in that field?

Question: How much dirt is in a hole that has a radius of 33.2 meters and a height of 78.2 meters?

Question: One day a bunny went golfing, he wore 2 pairs of pants, Why?

Question:

Take me for a spin and I'll make you cool,
but use me when it's cool and you're a fool.

What am I?