Child erotica is non-pornographic material relating to children that is used by any individuals for sexual purposes. It is a broader term than child pornography, incorporating material that may cause sexual arousal such as nonsexual images, books or magazines on children or pedophilia, toys, diaries, or clothes. Law enforcement investigators have found that child erotica is often collected by pedophiles and child sexual abuse offenders. Child erotica may be collected as a form of compulsive behavior and as a substitute for illegal child pornography and is often a form of evidence for criminal behavior.