I never really knew much about geology. We have a geologist in our family and last summer he treated our whole family to a trip to Utah to dig for fossils. I wasn't sure what to expect.
He packed each of us our own geologist backpack with all the tools we might need and then arranged for us to spend the day hammering away. We cracked geodes (my favorite) and then spent time hunting for trilobites - the little fossilized remains of prehistoric bugs. It was a great time.
We live in a state where there are lots of geologists so in response to their requests, here is my drawing about their trade.