This is it?

Upon arriving at the site of a rare petrified tree in Yellowstone, Grant summed it up best by saying "We came all this way to see a tree?  We have trees at home!"

We explained this was a special tree preserved as it had been hundreds of years ago. We explained how volcanic ash made this tree different than our trees at home. We then explained how there are no volcanos in Kentucky, therefore yes, it WAS. necessary to drive all that way to see a tree. 

Grant's suggestion?

We need to take home a volcano seed so we can make our own petrified trees.

That's my boy!