Electroshocking is for the kid in all of us.
Way back when I was a kid, my best friend's family owned the local rural telephone company. When they replaced the old wall-hanging crank telephones with "modern" phones (a heavy handset and something that looked like the next "more-modern" phone series -- but without a dial), the old oak cabinets and magnetos filled a small warehouse. As kids we had access to many hundreds of the old crank magnetos. We also had access to unlimited grounding rods and wire of all sizes and kinds.
Not only did we get our fishing night crawlers by putting two ground rods in the ground, and hooking them to one of the old phone magnetos -- but, we played a game that strengthened our hearts. We'd form circles of kids holding hands. The kids at the end of the circle would hold wires connected to the magneto, while one kid would crank the magneto. The first kid to let loose of the circle was the first looser, the second kid was the second looser, etc., until we got to the last kid.
I guess it is no wonder why I have heart arrhythmia.
So, with all that aside -- volunteering as an intern is an incredible experience. I've done it. I always have several interns working for me, and have for many years. We've also always paid our interns a fair wage. I've used them from high school through graduate school. In high school, you should be able to get graduation credits for interning.