I believe in them. My oldest daughter said she would see me watching her outside the playground or walking past the kindergarden door when I was at work in Boston. My family has a very close relationship to God, Religion, Spirituality or a mix and I just blessed the situation. It wasn't evil and it probably was her invisible friend which is normal for children. Usually the friend was a dragon but a dragon can't walk around the streets or building without a disguise. LOL