I did roughly the same thing, I think I was 3 or 4, my dad got me a couple of those big cylindrical dry cells with the screw terminals on top, some sockets, knife switches and made me a bunch of wire leads with crimp connectors on the ends. I had hours of fun playing with those.
Later I realized a 6V bulb I had would screw into the candelabra socket in the lights in my parents bedroom, I flipped the switch and it went pop, the whole bulb turned silvery black.