Today, we have this full page watercolor for Eveready batteries from 1935. It doesn't make me want to run right out and fill my trunk with batteries, but in this ad, Eveready is playing the long game, going for the soft sell. The objective here is the "Eveready love has plussed one!" feeling. It's all cozy and stuff, with a grandpa explaining geography to his grandchildren with the help of an Eveready flashlight.
Or, you can think of it as a rich, demonic robber baron explaining to his grandchildren how the whole of humanity will be subjugated wo his will, once he completes the construction of his sun blocker, plunging the world into shadow, and he alone will control the light. It is Fortune magazine, after all. We can also assume that, once grandpa has finished the sun blocker demonstration, he would lead the kids in a rousing chorus of "mu-hu-ha-ha-ha-ha" practice.
Click it for the big version. You deserve it.