Ever catch your child talking to an imaginary friend? Don't worry; these invisible playmates are a cause for celebration, not concern. Pretend friends can be a healthy part of your child's developing conscience and value system. They keep her company, provide solace, and even share the blame for the things your child wishes she hadn't done. By the age of six, most kids lose interest in them. Until then, let your child enjoy the companionship and commit these moments to memory. They'll make for nice reminiscences when your little one is all grown up.