reporter: the director of the center, marie hoover, says the children become comfortable with elderly residents at an early age. >> whether they're in a wheelchair, or in a walker maybe they're hard to understand, or you have to speak louder, it is just about who that individual is, and they adjust. the kids just really don't blink an eye. >> reporter: 93-year-old harriet thompson joined this sing-a-long on her way to the dining hall. >> i usually like to go sit down for a while before dinner, but heard them singing, so i went on in. >> reporter: what do you experience, internally when you're around these children? >> happiness, just plain old happiness, you know it beats anything else. beats television. >> boredom and loneliness at sort of the plagues of older adults. you see the residents, hear the sound of the kids coming down the hall, and it's as though sunlight just came through the window. >> i'm a great-great grandmother, but they're in another town. i can't hold my own little girl because she's far away. so this is what makes me happy. you get to know them, watch them, and act silly with them. it's good to feel like you're three years old again. >> rep