You might get a supply of small lights; some could fit on keyrings to have lights when opening doors late at night. Or to keep by the bed in case of a power outage. Of course, the lights entertain kittens and dogs on the walls too.
How about a flashlight? Print labels with the theme on them, get the lights at a dollar store. I like flaslights with a hanging cord on the back, and have them on the doorknobs in a few places of my home. Everyone can use another flashlight!