How old is the child? She is in an unfamiliar place. That can make it hard to sleep. Warm milk can help. Calcium is good for helping us to sleep. Are you trying to sleep, or are you up doing something? If all the lights are out, the child will be more likely to feel sleepy. If it looks like you are doing something fun, she probably is curious and wants to be involved. Where is she supposed to sleep? What if you gave her a pillow and blanket and let her or him settle down near you. She might fall asleep there easier than all alone in a strange place.