Brooke Greenberg is the size of a baby, but is actually a 20-year-old female. She just stopped growing. Despite the fact that she’s getting older, Brooke is physically and cognitively similar to a toddler, and a mental age of about 1 year old. She is unable to talk and she still has baby teeth. She still travels in a stroller and doctor’s have no idea why. See the photos below..