At House of Miller, during times of eating and napping, we frequently say "if you don't eat/nap/relax/stay still 5 seconds/etc , then you'll run out of batteries." As if a 2 or 3 year old understands the Energizer Bunny fully, or cares. And yet we still try. Here is our lunch conversation:
A: Okay Gwen...you ladies HAVE to eat your green beans and the rest of lunch, or else you'll run out of batteries."
G: No Mom! My batteries will stay IN, even if I don't eat."