A five-year-old is among nearly 400 children under the age of 12 to have been investigated by police for sexting.
Freedom of information requests by BBC Newcastle found there have been more than 4,000 cases of children taking explicit pictures of themselves and sending them to others since 2013.
It is illegal to possess, take or distribute sexual images of someone who is under 18, even if that person is yourself. Breaking that law can result in under-18s receiving a police caution or being put on the sex offender register.