This handbook is designed to act as a ready reference for Law Enforcement Officials and prosecutors to understand cyber crimes against children. Cyber Crimes are generally defined as those crimes in which a computer resource is either the target or is used as tool for committing the crime. These may even include cases where traditional crimes are facilitated by digital technologies as will become clear through the course of this handbook. The handbook focusses on presenting a clear picture of cyber crimes committed against children and when cyber crimes have been perpetrated by them. It also helps Investigating Officers to understand the application of special legislation like the Information Technology Act, Protection of Children from Sexual Offences (POSCO) Act and Juvenile Justice (Care and Protection) Act to such instances.